protuberance vs extrusion

protuberance and extrusion both are nouns.

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

As nouns, protuberance and extrusion are synonyms defined as:

protuberance and extrusion: something that bulges out or is protuberant or projects from its surroundings

Other synonyms of protuberance include bulge, bump, excrescence, gibbosity, gibbousness, hump, jut, prominence, protrusion, swelling.

protuberance (noun)	extrusion (noun)
something that bulges out or is protuberant or projects from its surroundings	squeezing out by applying pressure
the condition of being protuberant; the condition of bulging out	something that bulges out or is protuberant or projects from its surroundings