protrude vs protrusion

protrude is not a noun while protrusion is a noun.

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

protrude (noun)	protrusion (noun)
	the act of projecting out from something
	something that bulges out or is protuberant or projects from its surroundings

protrude (verb)	protrusion (verb)
swell or protrude outwards
bulge outward
extend out or project in space