extrusion vs protrusion

extrusion and protrusion both are nouns.

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

As nouns, extrusion and protrusion are synonyms defined as:

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

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

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