applaud vs hail

applaud is not a noun while hail is a noun.

Word	Noun	Adjective	Verb	Adverb
applaud	No	No	Yes	No
hail	Yes	No	Yes	No

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

Other hyponyms of applaud include cheer, acclaim, herald.

applaud (noun)	hail (noun)
	enthusiastic greeting
	many objects thrown forcefully through the air
	precipitation of ice pellets when there are strong rising air currents

applaud (verb)	hail (verb)
express that something is worthy of praise	greet enthusiastically or joyfully
clap one's hands or shout after performances to indicate approval	call for
	praise vociferously
	be a native of
	precipitate as small ice particles