Words that have identical vowel-based rhyme sounds in the tonic syllable. Moreover, that tonic syllable must start with a different consonantal sound.
There are none pure rhymes for "racehorses".
Words that have a pure rhyme on their last syllable only.
Lexus's
    Texas's
      slaughterhouses
        Waterhouse's
          purchases
            repurchases

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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)
              mattress's
                mattresses
                  palaces
                    callouses
                      Dallas's
                        cabbages
                          Babbage's

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                            Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."
                            Words that rhyme on the vowel-based rhyme sound of the last syllable only (for instance: “maybe” and “eat”). Near End Rhymes generally (but not always!) suck. Nonetheless, we provide them for you just in case you may find something useful.
                            Rostropovich
                              Shostakovich
                                linkage
                                  shrinkage
                                    portage
                                      shortage
                                        reportage

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