defend vs drive back

defend and drive back both are verbs.

Word	Noun	Adjective	Verb	Adverb
defend	No	No	Yes	No
drive back	No	No	Yes	No

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

defend (verb)	drive back (verb)
argue or speak in defense of	force or drive back
state or assert
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