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 "ya nan".
Words that have a pure rhyme on their last syllable only.
Monaghan
    Monahan
      doorman
        Forman
          Calahan
            Callaghan
              Callahan

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                Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely.
                Monaghan
                  Monahan
                    frogman
                      guardsman
                        Donegan
                          Mondrian
                            Tarzan
                              Carnahan
                                Marplan
                                  Colligan
                                    Costigan
                                      Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."