snivel vs sniffle

snivel and sniffle both are nouns.

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

As nouns, snivel and sniffle are synonyms defined as:

snivel and sniffle: the act of breathing heavily through the nose (as when the nose is congested)

Other synonyms of snivel include snuffle.

As verbs, snivel and sniffle are synonyms defined as:

Other synonyms of snivel include blub, blubber, snuffle.

snivel (noun)	sniffle (noun)
whining in a tearful manner	the act of breathing heavily through the nose (as when the nose is congested)
the act of breathing heavily through the nose (as when the nose is congested)

snivel (verb)	sniffle (verb)
snuff up mucus through the nose	inhale audibly through the nose
cry or whine with snuffling	cry or whine with snuffling
talk in a tearful manner