A stylistic device, often used in poetry. It is the repetition of consonant sounds in a short sequence of words, for example, the "t" sound in "Is it blunt and flat?" Alliteration differs from consonance insofar as alliteration requires the repeated consonant sound to be at the beginning of each word, where in consonance it is anywhere within the word, although often at the end. In half rhyme, the terminal consonant sound is repeated. A special species of consonance is using a series of sibilant sounds (/s/ and /sh/ for example); this is sometimes known simply as sibilance.