aversion vs avoidance

aversion and avoidance both are nouns.

Word	Noun	Adjective	Verb	Adverb
aversion	Yes	No	No	No
avoidance	Yes	No	No	No

As nouns, avoidance is a hypernym of aversion; that is, avoidance is a word with a broader meaning than aversion:

aversion: the act of turning yourself (or your gaze) away
avoidance: deliberately avoiding; keeping away from or preventing from happening

Other hypernyms of aversion include dodging, shunning, turning away.

aversion (noun)	avoidance (noun)
the act of turning yourself (or your gaze) away	deliberately avoiding; keeping away from or preventing from happening
a feeling of intense dislike