A rhyme that occurs in a final unstressed syllable: pleasure/leisure, longing/yearning.
When words of two or more syllables rhyme it is known as feminine or double rhyme. It is particularly common in humorous verse, as in the first two lines of this flippant epitaph: Here lie I and my four daughters, Killed by drinking Cheltenham waters. Had we but stuck to Epsom salts, We wouldn't have been in these here vaults.
A feminine rhyme, in English prosody, is a rhyme that matches two or more syllables at the end of the respective lines. Usually the final syllable is unstressed.