aircraft vs fleet

aircraft and fleet both are nouns.

Word	Noun	Adjective	Verb	Adverb
aircraft	Yes	No	No	No
fleet	Yes	Yes	Yes	No

aircraft (noun)	fleet (noun)
a vehicle that can fly	a group of warships organized as a tactical unit
	a group of steamships operating together under the same ownership
	group of motor vehicles operating together under the same ownership
	group of aircraft operating together under the same ownership

aircraft (adjective)	fleet (adjective)
	moving very fast

aircraft (verb)	fleet (verb)
	disappear gradually
	move along rapidly and lightly; skim or dart