WikiRhymer has about 4,000 rhyming words and phrases for "tuna" starting with...

kuna
    luna
      una
        fortuna
          kahuna
            koruna
              Altoona
                Buena
                  Duna
                    Iduna
                      Laguna
                        Oona
                          Pure Rhyme Set #1 of 1 (Add to/Edit Set Members)
                          Words that have a pure rhyme on their last syllable only.
                          outta
                            ruta
                              End Rhyme Set #1 of 376 (Add to/Edit Set Members)
                              hallelujah
                                alleluia
                                  End Rhyme Set #2 of 376 (Add to/Edit Set Members)
                                  Junia
                                    Petunia
                                      End Rhyme Set #3 of 376 (Add to/Edit Set Members)

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                                      Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely. (Click for more info)
                                      outta
                                        ruta
                                          Near Rhyme Set #1 of 20 (Add to/Edit Set Members)
                                          hallelujah
                                            alleluia
                                              Near Rhyme Set #2 of 20 (Add to/Edit Set Members)
                                              Junia
                                                Petunia
                                                  Near Rhyme Set #3 of 20 (Add to/Edit Set Members)

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                                                  Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."
                                                  • accrue + the
                                                  • adieu + the
                                                  • ado + the
                                                  • anew + the
                                                  • askew + the
                                                  • Baku + the
                                                  • bamboo + the
                                                  • bleu + the
                                                  • blew + the
                                                  • blue + the
                                                  • boo + the
                                                  • brew + the
                                                  • canoe + the
                                                  • chew + the
                                                  • Chu + the
                                                  • clue + the
                                                  • construe + the
                                                  • coo + the
                                                  • coup + the
                                                  • crew + the
                                                  • Crewe + the
                                                  • cue + the
                                                  • debut + the
                                                  • dew + the
                                                  • do + the
                                                  • doo + dah
                                                  • doo + the
                                                  • drew + the
                                                  • du + the
                                                  • due + the
                                                  • ensue + the
                                                  • eschew + the
                                                  • ew + the
                                                  • ewe + the
                                                  • few + ca
                                                  • few + the
                                                  • flew + the
                                                  • flu + the
                                                  • flue + the
                                                  • fu + the
                                                  • glue + the
                                                  • goo + the
                                                  • grew + the
                                                  • gu + the
                                                  • gue + the
                                                  • hew + the
                                                  • hitherto + the
                                                  • hoo + the
                                                  • Hsu + the
                                                  • hu + the
                                                  • hue + the
                                                  • Hugh + the
                                                  • imbue + the
                                                  • into + ca
                                                  • into + the
                                                  • Jew + the
                                                  • Ju + the
                                                  • Kew + the
                                                  • knew + the
                                                  • ku + the
                                                  • leu + the
                                                  • lew + the
                                                  • lieu + the
                                                  • Liu + the
                                                  • loo + the
                                                  • Lou + the
                                                  • lu + the
                                                  • lue + the
                                                  • mew + the
                                                  • misconstrue + the
                                                  • mu + the
                                                  • new + ca
                                                  • new + the
                                                  • nu + the
                                                  • ou + the
                                                  • outdo + the
                                                  • outgrew + the
                                                  • overdo + the
                                                  • overdue + the
                                                  • overthrew + the
                                                  • Peru + the
                                                  • pew + the
                                                  • poo + the
                                                  • pooh + the
                                                  • Prue + the
                                                  • pu + the
                                                  • Pugh + the
                                                  • pursue + the
                                                  • q + the
                                                  • qu + the
                                                  • que + ca
                                                  • que + the
                                                  • queue + the
                                                  • redo + the
                                                  • renew + the
                                                  • review + the
                                                  • revue + the
                                                  • rew + the
                                                  • ru + the
                                                  • rue + the
                                                  • screw + the
                                                  • shampoo + the
                                                  • shoe + the
                                                  • shoo + the
                                                  • Shu + the
                                                  • Sioux + the
                                                  • skew + the
                                                  • slew + the
                                                  • soo + the
                                                  • spew + the
                                                  • stew + the
                                                  • strew + the
                                                  • Stu + the
                                                  • su + the
                                                  • subdue + the
                                                  • sue + the
                                                  • taboo + the
                                                  • tattoo + the
                                                  • tew + the
                                                  • thew + the
                                                  • threw + the
                                                  • through + the
                                                  • thru + the
                                                  • Timbuktu + the
                                                  • to + Brugh
                                                  • to + ca
                                                  • to + duh
                                                  • to + huh
                                                  • to + Sta
                                                  • to + the
                                                  • to + uh
                                                  • too + huh
                                                  • too + the
                                                  • trew + the
                                                  • true + the
                                                  • tu + the
                                                  • tue + the
                                                  • two + ca
                                                  • two + the
                                                  • u + ca
                                                  • u + the
                                                  • undo + the
                                                  • undue + the
                                                  • unglue + the
                                                  • untrue + the
                                                  • Urdu + the
                                                  • view + the
                                                  • vu + the
                                                  • whew + the
                                                  • who + ca
                                                  • who + the
                                                  • withdrew + the
                                                  • woo + the
                                                  • Wu + the
                                                  • xu + the
                                                  • yew + the
                                                  • you + ca
                                                  • you + huh
                                                  • you + the
                                                  • you + uh
                                                  • yu + the
                                                  • zoo + the
                                                  Mosaic Rhyme Set #1 of 1 (Add to/Edit Set Members)