say farewell vs recognise

say farewell and recognise both are verbs.

Word	Noun	Adjective	Verb	Adverb
say farewell	No	No	Yes	No
recognise	No	No	Yes	No

As verbs, recognise is a hypernym of say farewell; that is, recognise is a word with a broader meaning than say farewell:

Other hypernyms of say farewell include greet, recognize.

say farewell (verb)	recognise (verb)
say good-bye or bid farewell	perceive to be the same
	be fully aware or cognizant of
	accept (someone) to be what is claimed or accept his power and authority
	express obligation, thanks, or gratitude for
	express greetings upon meeting someone
	detect with the senses
	grant credentials to
	show approval or appreciation of