introvert vs retract

introvert is a noun but retract is not a noun.

Word	Noun	Adjective	Verb	Adverb
introvert	Yes	No	Yes	No
retract	No	No	Yes	No

As verbs, retract is a hypernym of introvert; that is, retract is a word with a broader meaning than introvert:

Other hypernyms of introvert include draw in.

introvert (noun)	retract (noun)
(psychology) a person who tends to shrink from social contacts and to become preoccupied with their own thoughts

introvert (verb)	retract (verb)
turn inside	formally reject or disavow a formerly held belief, usually under pressure
fold inwards	pull inward or towards a center
	use a surgical instrument to hold open (the edges of a wound or an organ)
	pull away from a source of disgust or fear