Alliteration is the repetition of initial consonant sound in two or more neighboring words or syllables.
Also known as
Initial Rhyme.

Here are some examples:

the wild winds of winter
Peter Piper picked a peck of pickled peppers.

Whether the weather be fine

Or whether the weather be not,

Whether the weather be cold

Or whether the weather be hot,

We'll weather the weather

Whatever the weather,

Whether we like it or not.

-- Anonymous