aggressiveness vs aggressive

aggressiveness is a noun but aggressive is not a noun.

Word	Noun	Adjective	Verb	Adverb
aggressiveness	Yes	No	No	No
aggressive	No	Yes	No	No

aggressiveness (noun)	aggressive (noun)
the quality of being bold and enterprising
a natural disposition to be hostile
a feeling of hostility that arouses thoughts of attack

aggressiveness (adjective)	aggressive (adjective)
	having or showing determination and energetic pursuit of your ends
	characteristic of an enemy or one eager to fight
	tending to spread quickly