This document defines and provides examples of different types of sound devices used in poetry and literature, including alliteration, assonance, consonance, onomatopoeia, rhyme, exact rhyme, approximate rhyme, end rhymes, and internal rhymes. It explains that alliteration is the repetition of initial consonant sounds, assonance involves repeating vowel sounds, and consonance loosely repeats consonant sounds at the end of words. Onomatopoeia imitates the sounds associated with things or actions. Rhyme repeats similar sounds at the end of lines, which can be exact or approximate, and occur internally or at the end of lines.