WikiRhymer has about 6,000 rhyming words and phrases for "reducin'" starting with...

Words that have identical vowel-based rhyme sounds in the tonic syllable. Moreover, that tonic syllable must start with a different consonantal sound.
loosin'
    sluicin'
      sprucin'
        inducin'
          producin'
            seducin'
              introducin'
                reproducin'
                  overproducin'
                    reintroducin'
                      Poussin
                        Rusin
                          Pure Rhyme Set #1 of 1 (Add to/Edit Set Members)
                          Words that have a pure rhyme on their last syllable only.
                          ceasin'
                            greasin'
                              leasin'
                                piecin'
                                  decreasin'
                                    increasin'
                                      policin'
                                        releasin'
                                          subleasin'
                                            unceasin'
                                              End Rhyme Set #1 of 691 (Add to/Edit Set Members)
                                              bleedin'
                                                breedin'
                                                  cedin'
                                                    feedin'
                                                      heedin'
                                                        kneadin'
                                                          leadin'
                                                            needin'
                                                              pleadin'
                                                                readin'
                                                                  seedin'
                                                                    speedin'
                                                                      weedin'
                                                                        accedin'
                                                                          concedin'
                                                                            exceedin'
                                                                              impedin'
                                                                                inbreedin'
                                                                                  misleadin'
                                                                                    misreadin'
                                                                                      precedin'
                                                                                        preceedin'
                                                                                          proceedin'
                                                                                            recedin'
                                                                                              rereadin'
                                                                                                secedin'
                                                                                                  stampedin'
                                                                                                    succeedin'
                                                                                                      intercedin'
                                                                                                        supersedin'
                                                                                                          Redin'
                                                                                                            End Rhyme Set #2 of 691 (Add to/Edit Set Members)
                                                                                                            continuin'
                                                                                                              discontinuin'
                                                                                                                End Rhyme Set #3 of 691 (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)
                                                                                                                to rin'
                                                                                                                  Turenne
                                                                                                                    Near Rhyme Set #1 of 21 (Add to/Edit Set Members)
                                                                                                                    broodin'
                                                                                                                      feudin'
                                                                                                                        alludin'
                                                                                                                          colludin'
                                                                                                                            concludin'
                                                                                                                              deludin'
                                                                                                                                denudin'
                                                                                                                                  eludin'
                                                                                                                                    excludin'
                                                                                                                                      extrudin'
                                                                                                                                        includin'
                                                                                                                                          intrudin'
                                                                                                                                            precludin'
                                                                                                                                              protrudin'
                                                                                                                                                Boudin
                                                                                                                                                  Rudin
                                                                                                                                                    Near Rhyme Set #2 of 21 (Add to/Edit Set Members)
                                                                                                                                                    gruelin'
                                                                                                                                                      Llewelyn
                                                                                                                                                        Near Rhyme Set #3 of 21 (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."

                                                                                                                                                        We have no mosaic rhymes for "reducin'".

                                                                                                                                                        Mosaic Rhyme Set #1 of 1 (Add to/Edit Set Members)