WikiRhymer has about 900 rhyming words and phrases for "stadium" starting with...

radium
    palladium
      vanadium
        Pure Rhyme Set #1 of 1 (Add to/Edit Set Members)
        Words that have a pure rhyme on their last syllable only.
        medium
          tedium
            • strike a happy medium
            End Rhyme Set #1 of 116 (Add to/Edit Set Members)
            cranium
              geranium
                titanium
                  uranium
                    End Rhyme Set #2 of 116 (Add to/Edit Set Members)
                    datum
                      verbatim
                        ultimatum
                          Mentholatum
                            Tatum
                              End Rhyme Set #3 of 116 (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)
                              cranium
                                geranium
                                  titanium
                                    uranium
                                      Near Rhyme Set #1 of 7 (Add to/Edit Set Members)
                                      datum
                                        verbatim
                                          ultimatum
                                            Mentholatum
                                              Tatum
                                                Near Rhyme Set #2 of 7 (Add to/Edit Set Members)
                                                Bensalem
                                                  Salem
                                                    Near Rhyme Set #3 of 7 (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 "stadium".

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