sob vs weeping

sob and weeping both are nouns.

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

As nouns, weeping is a hypernym of sob; that is, weeping is a word with a broader meaning than sob:

sob: convulsive gasp made while weeping
weeping: the process of shedding tears (usually accompanied by sobs or other inarticulate sounds)

Other hypernyms of sob include crying, tears.

sob (noun)	weeping (noun)
convulsive gasp made while weeping	the process of shedding tears (usually accompanied by sobs or other inarticulate sounds)

sob (adjective)	weeping (adjective)
	showing sorrow
	having branches or flower heads that bend downward

sob (verb)	weeping (verb)
weep convulsively