cry vs blub

cry is a noun but blub is not a noun.

Word	Noun	Adjective	Verb	Adverb
cry	Yes	No	Yes	No
blub	No	No	Yes	No

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

Other hyponyms of cry include mewl, pule, wail, whimper, bawl, tear, sob, blubber, sniffle, snivel, snuffle.

cry (noun)	blub (noun)
a loud utterance; often in protest or opposition
a fit of weeping
a slogan used to rally support for a cause
a loud utterance of emotion (especially when inarticulate)
the characteristic utterance of an animal

cry (verb)	blub (verb)
shed tears because of sadness, rage, or pain	cry or whine with snuffling
bring into a particular state by crying
utter a sudden loud cry
proclaim or announce in public
utter a characteristic sound
utter aloud; often with surprise, horror, or joy
demand immediate action