avoidance vs aversion

avoidance and aversion both are nouns.

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

As nouns, aversion is a hyponym of avoidance; that is, aversion is a word with a more specific, narrower meaning than avoidance:

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

Other hyponyms of avoidance include averting, escape, near thing.

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