头韵法（Alliteration）是西方诗歌里的一种押韵形式，它是说一行韵文或一首诗的好几个词的头一个字母辅音不断重复，这样形成了一个韵律。像一个有名的英语绕口令（头韵是字母p）：

Peter Piper picked a pek of pickled peppers, A peck of pickled peppers Peter Piper picked. If Peter Piper picked a peck of pickled peppers, How many pickled peppers did Peter Piper pick?

Alliteration is a stylistic literary device identified by the repeated sound of the first consonant in a series of multiple words, or the repetition of the same sounds of the same kinds of sounds at the beginning of words or in stressed syllables of a phrase. "Alliteration" from the Latin word “litera”, meaning “letters of the alphabet”, and the first known use of the word to refer to a literary device occurred around 1624. Alliteration narrowly refers to the repetition of a consonant in any syllables that, according to the poem's meter, are stressed, as in James Thomson's verse "Come…dragging the lazy languid Line along". Another example is, "Peter Piper picked a peck of pickled peppers".