Words that have identical vowel-based rhyme sounds in the tonic syllable. Moreover, that tonic syllable must start with a different consonantal sound.
crackdown
    Words that have a pure rhyme on their last syllable only.
    knockdown
      lockdown
        rundown
          sundown
            breakdown
              shakedown

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                Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely.
                clampdown
                  shantytown
                    Lansdowne
                      Ashdown
                        Adamstown
                          Stanleytown
                            Allentown
                              Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."