hail vs greet

hail is a noun but greet is not a noun.

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

As verbs, greet is a hypernym of hail; that is, greet is a word with a broader meaning than hail:

Other hypernyms of hail include recognise, recognize.

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

hail (verb)	greet (verb)
greet enthusiastically or joyfully	react to in a certain way
call for	express greetings upon meeting someone
praise vociferously	send greetings to
be a native of	be perceived by
precipitate as small ice particles