prominence vs nubble

prominence and nubble both are nouns.

Word	Noun	Adjective	Verb	Adverb
prominence	Yes	No	No	No
nubble	Yes	No	No	No

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

prominence: something that bulges out or is protuberant or projects from its surroundings
nubble: a small lump or protuberance

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

prominence (noun)	nubble (noun)
relative importance or fame	a small lump or protuberance
something that bulges out or is protuberant or projects from its surroundings
the state of being prominent: widely known or eminent