introversion vs psychology

introversion and psychology both are nouns.

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

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