argue vs defend

argue and defend both are verbs.

Word	Noun	Adjective	Verb	Adverb
argue	No	No	Yes	No
defend	No	No	Yes	No

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

Other hyponyms of argue include re-argue, expostulate, fend for, support.

argue (verb)	defend (verb)
have an argument about something	argue or speak in defense of
give evidence of	state or assert
present reasons and arguments	be on the defensive; act against an attack
	protect against a challenge or attack
	protect or fight for as a champion
	fight against or resist strongly
	be the defense counsel for someone in a trial