Virgil also incorporated such poetic devices as alliteration, onomatopoeia, synecdoche, and assonance. Rhyme, alliteration, assonance and consonance are ways of creating repetitive patterns of sound. Devices such as assonance, alliteration, onomatopoeia, and rhythm may convey musical or incantatory effects. A few useful mnemonic devices include alliteration, repetition, assonance, and proverbial sayings. In some folk songs assonance, alliteration, and onomatopoeia are also used. A phonetic isotopy is the recurrence of phonomenes, like in rhyme, assonance and alliteration. He also frequently uses alliteration and assonance. The poem is also rife with imagery, alliteration, and assonance. His lyrics contain layered rhythms, multisyllabic rhymes, internal half rhymes, assonance, and enjambment. King simply changed the names of the mountains and used much more alliteration and assonance. Consonance may be regarded as the counterpart to the vowel-sound repetition known as assonance. However, assonance between consonants is generally called "consonance" in American usage. Assonance is the repetition of similar vowel sounds across neighbouring words. Assonance in place of rhyme is common. Half rhyme is often used, along with assonance, in rap music.