extraversion vs introversion

extraversion and introversion both are nouns.

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

extraversion (noun)	introversion (noun)
(psychology) an extroverted disposition; concern with what is outside the self	(psychology) an introverted disposition; concern with one's own thoughts and feelings
	the folding in of an outer layer so as to form a pocket in the surface
	the condition of being folded inward or sheathed