Definition of Onomatopoeia, Alliteration, and Assonance?

Question

The Definitions of Onomatopoeia, Alliteration, and Assonance                                 

Answer 1

Onomatopoeia: words that sound like they mean, cough, shimmering, tintinnabulation.

Alliteration: two or more words starting with the same consonant, Betty's batter is better with butter.

Assonance: two or more word with the same internal vowel sound: sentence based on penitence.

Answer 2

Use a dictionary.  It's faster, easier and probably more correct than asking here.