protrude vs spear

protrude is not a noun while spear is a noun.

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

As verbs, spear is a hyponym of protrude; that is, spear is a word with a more specific, narrower meaning than protrude:

Other hyponyms of protrude include overhang, push up, thrust, spear up, bag, bulge, cantilever.

protrude (noun)	spear (noun)
	a long pointed rod used as a tool or weapon
	an implement with a shaft and barbed point used for catching fish

protrude (verb)	spear (verb)
swell or protrude outwards	pierce with a spear
bulge outward	thrust up like a spear
extend out or project in space