recognize vs welcome

recognize is not a noun while welcome is a noun.

Word	Noun	Adjective	Verb	Adverb
recognize	No	No	Yes	No
welcome	Yes	Yes	Yes	No

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

Other hyponyms of recognize include shake hands, bob, curtsy, salute, present, salute, salute, hail, herald, receive, say farewell, bid, wish.

recognize (noun)	welcome (noun)
	a greeting or reception
	the state of being welcome

recognize (adjective)	welcome (adjective)
	giving pleasure or satisfaction or received with pleasure or freely granted

recognize (verb)	welcome (verb)
perceive to be the same	bid welcome to; greet upon arrival
be fully aware or cognizant of	receive someone, as into one's house
accept (someone) to be what is claimed or accept his power and authority	accept gladly
express obligation, thanks, or gratitude for
express greetings upon meeting someone
detect with the senses
grant credentials to
show approval or appreciation of
exhibit recognition for (an antigen or a substrate)