flattop vs arrester hook

flattop and arrester hook both are nouns.

Word	Noun	Adjective	Verb	Adverb
flattop	Yes	No	No	No
arrester hook	Yes	No	No	No

flattop (noun)	arrester hook (noun)
a large warship that carries planes and has a long flat deck for takeoffs and landings	a restraint that slows airplanes as they land on the flight deck of an aircraft carrier
a closely cropped haircut; usually for men or boys