proactive vs active

proactive is not a noun while active is a noun.

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

proactive (noun)	active (noun)
	a person who is a participating member of an organization
	the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb
	chemical agent capable of activity

proactive (adjective)	active (adjective)
descriptive of any event or stimulus or process that has an effect on events or stimuli or processes that occur subsequently	(used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being
(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	characterized by energetic activity
	tending to become more severe or wider in scope
	disposed to take action or effectuate change
	(of e.g. volcanoes) erupting or liable to erupt
	(of e.g. volcanoes) capable of erupting
	full of activity or engaged in continuous activity
	exerting influence or producing a change or effect
	engaged in full-time work
	expressing that the subject of the sentence has the semantic function of actor:
	(of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions
	in operation
	taking part in an activity
	engaged in or ready for military or naval operations