In her book The Discovery of Poetry, Frances Mayes discusses rhyme within the context of repetition. This element of craft goes far beyond the end-stopped pure rhymes (mop/top) most people associate with poetry. Rhyme can be any kind of repetition of sound: slant rhymes (month/up); internal rhymes (the loud cloud growled); alliteration, consonance, and assonance (“tremendous fish,” “speckled with barnacles,” “coarse white flesh”); repetition of words, or repetition of entire lines.
Elizabeth Bishop uses all these techniques. Rhyme runs through her poetry like a subtle thread: always there, but not often when or how it’s expected. Even her prose poems (“Rainy Season: Sub-Tropics”) contain internal rhyme, alliteration, consonance, and assonance: “My sides move in rhythmic waves, just off the ground, from front to back, the wake of a ship, a wax-white water, or a slowly melting floe.” One can also interpret the overlap of events in these prose poems as a kind of rhyme. In each piece, the titular animal speaks but portrays the same encounters from a different perspective: “Beware, you frivolous crab,” says the toad. “And I want nothing to do with you either, sulking toad,” says the crab. “Cheer up, O grievous snail. I tap your shell, encouragingly,” says the crab. “What’s that tapping on my shell?” asks the snail.