assonant vs assonance

assonant is not a noun while assonance is a noun.

Word	Noun	Adjective	Verb	Adverb
assonant	No	Yes	No	No
assonance	Yes	No	No	No

assonant (noun)	assonance (noun)
	the repetition of similar vowels in the stressed syllables of successive words

assonant (adjective)	assonance (adjective)
having the same vowel sound occurring with different consonants in successive words or stressed syllables
having the same sound (especially the same vowel sound) occurring in successive stressed syllables