hump vs nubble

hump and nubble both are nouns.

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

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

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

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

hump (noun)	nubble (noun)
something that bulges out or is protuberant or projects from its surroundings	a small lump or protuberance

hump (verb)	nubble (verb)
have sexual intercourse with
round one's back by bending forward and drawing the shoulders forward