recognize vs herald

recognize is not a noun while herald is a noun.

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

As verbs, herald is a hyponym of recognize; that is, herald 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, receive, welcome, say farewell, bid, wish.

recognize (noun)	herald (noun)
	something that precedes and indicates the approach of something or someone
	(formal) a person who announces important news

recognize (verb)	herald (verb)
perceive to be the same	foreshadow or presage
be fully aware or cognizant of	praise vociferously
accept (someone) to be what is claimed or accept his power and authority	greet enthusiastically or joyfully
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)