Are alliteration and assonance are the same?

Alliteration and assonance are not the same.

- Alliteration is the repetition of consonant sounds at the beginning of words or stressed syllables.

- Assonance is the repetition of vowel sounds within words.

For example, "Peter Piper picked a peck of pickled peppers" is alliteration (consonant /p/) while "The cat sat on the rat" is assonance (vowel /a/).