The repetition of initial consonant sounds in poetry is

The repetition of initial consonant sounds in poetry is called alliteration. Alliteration is the repetition of the same sound or letter at the beginning of adjacent or closely connected words. This literary device is often used in poetry to create a musical or rhythmic effect and to emphasize certain words or phrases. An example of alliteration is "Peter Piper picked a peck of pickled peppers."