weep vs sniffle

weep is not a noun while sniffle is a noun.

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

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

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

weep (noun)	sniffle (noun)
	the act of breathing heavily through the nose (as when the nose is congested)

weep (verb)	sniffle (verb)
shed tears because of sadness, rage, or pain	inhale audibly through the nose
	cry or whine with snuffling