call back vs recognise

call back and recognise both are verbs.

Word	Noun	Adjective	Verb	Adverb
call back	No	No	Yes	No
recognise	No	No	Yes	No

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

Other hyponyms of call back include know, recognize, brush up, refresh, review.

call back (verb)	recognise (verb)
recall knowledge from memory; have a recollection	perceive to be the same
summon to return	be fully aware or cognizant of
return or repeat a telephone call	accept (someone) to be what is claimed or accept his power and authority
cause to be returned	express obligation, thanks, or gratitude for
	express greetings upon meeting someone
	detect with the senses
	grant credentials to
	show approval or appreciation of