There is one specialised form of alliteration called "Symmetrical Alliteration". 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. The poem is also rife with imagery, alliteration, and assonance. In some folk songs assonance, alliteration, and onomatopoeia are also used. He also frequently uses alliteration and assonance. A phonetic isotopy is the recurrence of phonomenes, like in rhyme, assonance and alliteration. Poetry uses devices such as&colon; alliteration, repetition, rhyme, metaphors, and similes. King simply changed the names of the mountains and used much more alliteration and assonance. Tools to aid this process include poetic devices such as rhyme and alliteration. He also added instances of wordplay and alliteration to compensate for difficult Japanese jokes. That is, alliteration containing parallelism, or chiasmus. In Latin rhetoric and poetry homeoteleuton and alliteration were frequently used devices.