Euphony Lines that are musically pleasant to the ear bring euphony. There is a harmony and a beauty to the language, which is what many poets are often after. Than Oars divide the Ocean, Too silver for a seam Or Butterflies, off Banks of Noon Leap, plashless as they swim. Cacophony A jarring, jangling juxtaposition of words can be used to bring attention, too. Onomatopoeia refers to words whose sound is suggestive of its meaning.
Rhymed words call attention to each other, so carry more weight.
While rhymed poetry has not been particularly popular in the last forty years, songwriters use it often. In fact, it makes it easier for listeners to remember the words, and it also helps carry rhythm. Judicious use of rhyme in prose can bring a subtle emphasis to particular words. He never wanted to fly because he didn't want to die. Rhythm Essential in poetry and often in prose, rhythm refers to the regular or progressive patterns of accents in lines or sentences.