cry vs sob

cry and sob both are nouns.

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

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

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

cry (noun)	sob (noun)
a loud utterance; often in protest or opposition	convulsive gasp made while weeping
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)	sob (verb)
shed tears because of sadness, rage, or pain	weep convulsively
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