advertise vs crusade

advertise is not a noun while crusade is a noun.

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

As verbs, crusade is a hyponym of advertise; that is, crusade is a word with a more specific, narrower meaning than advertise:

advertise: make publicity for; try to sell (a product)
crusade: 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

Other hyponyms of advertise include propagandise, propagandize, plug, bill, agitate, campaign, fight, press, push.

advertise (noun)	crusade (noun)
	a series of actions advancing a principle or tending toward a particular end

advertise (verb)	crusade (verb)
make publicity for; try to sell (a product)	go on a crusade; fight a holy war
call attention to	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