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 "rachel o'brien".
Words that have a pure rhyme on their last syllable only.
purchasin'
    repurchasin'
      rationin'
        stationin'
          vacationin'
            regulatin'
              deregulatin'

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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)
                rationin'
                  stationin'
                    vacationin'
                      lengthenin'
                        strengthenin'
                          stabilizin'
                            destabilizin'

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                              Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."
                              There are no mosaic rhymes for "rachel o'brien".
                              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.
                              Oakville
                                Tocqueville
                                  Coville
                                    Monroeville
                                      Scoville
                                        gruel
                                          Jewell
                                            Sewell

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