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 no pure rhymes for "pack a".
Words that have a pure rhyme on their last syllable only.
chalet
    salay
      Dalai
        Hanway
          Stanway
            cachet
              sashay

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                Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely.
                chalet
                  salay
                    Dalai
                      Hanway
                        Stanway
                          cachet
                            sashay

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                              Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."