invade vs invader

invade is not a noun while invader is a noun.

Word	Noun	Adjective	Verb	Adverb
invade	No	No	Yes	No
invader	Yes	No	No	No

invade (noun)	invader (noun)
	someone who enters by force in order to conquer

invade (verb)	invader (verb)
march aggressively into another's territory by military force for the purposes of conquest and occupation
penetrate or assault, in a harmful or injurious way
to intrude upon, infringe, encroach on, violate
occupy in large numbers or live on a host