Vowel rhyme is a rhyme effect created by repeating the same or a closely related vowel sound in stressed syllables, usually with different ending consonants. It is often the same device called assonance. Poets use it to link words by sound without full end rhyme, which can make a line feel softer, looser, or more subtle.
Example
The old road groaned beneath the slow red wheel
while crows drifted low over the gold hill.
[n] the repetition of similar vowels in the stressed syllables of successive words