protrusion vs extrusion

protrusion and extrusion both are nouns.

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

As nouns, protrusion and extrusion are synonyms defined as:

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

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

protrusion (noun)	extrusion (noun)
the act of projecting out from something	squeezing out by applying pressure
something that bulges out or is protuberant or projects from its surroundings	something that bulges out or is protuberant or projects from its surroundings