Poetic device exemplified in Keats and Yeats?

• Good for food, for example, which a poet might use?

Wiktionary Word definitions in Wiktionary
n. Pairs of words (or syllables) that, because of their spelling, look as if they rhyme but, because of different pronunciation, do not

Wikipedia Word definitions in Wikipedia
An eye rhyme , also called a visual rhyme or a sight rhyme , is a rhyme in which two words are spelled similarly but pronounced differently. An example is the pair cough and bough ; although they look similar, and should rhyme based on the visual aspect, ...

WordNet Word definitions in WordNet
n. an imperfect rhyme (e.g., `love' and `move')