weep vs blubber

weep is not a noun while blubber is a noun.

Word	Noun	Adjective	Verb	Adverb
weep	No	No	Yes	No
blubber	Yes	No	Yes	No

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

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

weep (noun)	blubber (noun)
	excess bodily weight
	an insulating layer of fat under the skin of whales and other large marine mammals; used as a source of oil

weep (verb)	blubber (verb)
shed tears because of sadness, rage, or pain	cry or whine with snuffling
	utter while crying