ALLITERATION
alliteration, initial rhyme, beginning rhyme, head rhyme
(noun) use of the same consonant at the beginning of each stressed syllable in a line of verse; “around the rock the ragged rascal ran”
Source: WordNet® 3.1
Etymology
Noun
alliteration (countable and uncountable, plural alliterations)
The repetition of consonant sounds at the beginning of two or more words immediately succeeding each other, or at short intervals.
The recurrence of the same letter in accented parts of words, as in Anglo-Saxon alliterative meter.
Source: Wiktionary
Al*lit`er*a"tion, n. Etym: [L. ad + litera letter. See Letter.]
Definition: The repetition of the same letter at the beginning of two or
more words immediately succeeding each other, or at short intervals;
as in the following lines: -
Behemoth, biggest born of earth, upheaved His vastness. Milton.
Fly o'er waste fens and windy fields. Tennyson.
Note: The recurrence of the same letter in accented parts of words is
also called alliteration. Anglo-Saxon poetry is characterized by
alliterative meter of this sort. Later poets also employed it.
In a somer seson whan soft was the sonne, I shope me in shroudes as I
a shepe were. P. Plowman.
Source: Webster’s Unabridged Dictionary 1913 Edition