proactive vs psychology

proactive is not a noun while psychology is a noun.

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

proactive (noun)	psychology (noun)
	the science of mental life

proactive (adjective)	psychology (adjective)
descriptive of any event or stimulus or process that has an effect on events or stimuli or processes that occur subsequently
(of a policy or person or action) controlling a situation by causing something to happen rather than waiting to respond to it after it happens