crusader vs crusade

crusader and crusade both are nouns.

Word	Noun	Adjective	Verb	Adverb
crusader	Yes	No	No	No
crusade	Yes	No	Yes	No

crusader (noun)	crusade (noun)
a disputant who advocates reform	a series of actions advancing a principle or tending toward a particular end

crusader (verb)	crusade (verb)
	go on a crusade; fight a holy war
	exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for