protuberance vs snag

protuberance and snag both are nouns.

Word	Noun	Adjective	Verb	Adverb
protuberance	Yes	No	No	No
snag	Yes	No	Yes	No

As nouns, snag is a hyponym of protuberance; that is, snag is a word with a more specific, narrower meaning than protuberance:

protuberance: something that bulges out or is protuberant or projects from its surroundings
snag: a sharp protuberance

Other hyponyms of protuberance include frontal eminence, occipital protuberance, belly, caput, mogul, nub, nubble, wart.

protuberance (noun)	snag (noun)
something that bulges out or is protuberant or projects from its surroundings	an unforeseen obstacle
the condition of being protuberant; the condition of bulging out	an opening made forcibly as by pulling apart
	a dead tree that is still standing, usually in an undisturbed forest
	a sharp protuberance

protuberance (verb)	snag (verb)
	catch on a snag
	hew jaggedly
	get by acting quickly and smartly