Light rhyme refers to a type of rhyme where the final syllable of one word is stressed, while the final syllable of the paired word is unstressed. This kind of rhyme is sometimes called a wrenched rhyme because the pronunciation of the unstressed syllable is adjusted to match the stressed syllable of its partner, as in the example "eternity/free." Light rhymes are often used in music, where the final syllable of a word is emphasized in a way that feels unnatural.
Examples
In the 1917 poem "Preludes," T.S. Eliot used light rhyme to show the feeling of worry experienced by a person who feels alone in a busy city.