* Assonance is the repetition of vowel sounds within words, even if the words themselves are different. For example, "The sea shells shined in the sun." This line uses assonance by repeating the short "i" sound.
* Consonance is the repetition of consonant sounds within words, even if the words themselves are different. For example, "The snake slithered silently through the trees." This line uses consonance by repeating the "s" and "t" sounds.
Both assonance and consonance can be used to create a musical effect in poetry, adding to the rhythm and flow of the lines. They can also be used to emphasize certain words or ideas, and to create a particular mood or atmosphere.