introversion vs introvert

introversion and introvert both are nouns.

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

introversion (noun)	introvert (noun)
(psychology) an introverted disposition; concern with one's own thoughts and feelings	(psychology) a person who tends to shrink from social contacts and to become preoccupied with their own thoughts
the folding in of an outer layer so as to form a pocket in the surface
the condition of being folded inward or sheathed

introversion (verb)	introvert (verb)
	turn inside
	fold inwards