protuberance vs mogul

protuberance and mogul both are nouns.

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

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

protuberance: something that bulges out or is protuberant or projects from its surroundings
mogul: a bump on a ski slope

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

protuberance (noun)	mogul (noun)
something that bulges out or is protuberant or projects from its surroundings	a very wealthy or powerful businessman
the condition of being protuberant; the condition of bulging out	a bump on a ski slope