The occurrence of the same letter or sound at the beginning of adjacent or connected words.
Consonance
The recurrence of similar sounds, especially consonants.
Assonance
The repetition of the sound of a vowel in non rhyming stressed syllables.
Onomatopoeia
The formation of a word from a sound associated with what is named.
Internal Rhyme
The rhyme involving a word in the middle of a line and another at the end of the line or in the middle of the next
Example- Once upon a midnight DREARY, while I pondered, weak and WEARY.