fly vs pass

fly and pass both are nouns.

Word	Noun	Adjective	Verb	Adverb
fly	Yes	Yes	Yes	No
pass	Yes	Yes	Yes	No

As verbs, pass is a hypernym of fly; that is, pass is a word with a broader meaning than fly:

Other hypernyms of fly include elapse, glide by, go along, go by, lapse, slide by, slip away, slip by.

fly (noun)	pass (noun)
(baseball) a hit that flies up in the air	(sports) the act of throwing the ball to another member of your team
two-winged insects characterized by active flight	a usually brief attempt
an opening in a garment that is closed by a zipper or by buttons concealed under a fold of cloth	(American football) a play that involves one player throwing the ball to a teammate
flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent	(baseball) an advance to first base by a batter who receives four balls
fisherman's lure consisting of a fishhook decorated to look like an insect	success in satisfying a test or requirement
	a flight or run by an aircraft over a target
	a permit to enter or leave a military installation
	any authorization to pass or go somewhere
	an automatic advance to the next round in a tournament without playing an opponent
	a document indicating permission to do something without restrictions
	a complimentary ticket
	a difficult juncture
	one complete cycle of operations (as by a computer)
	the location in a range of mountains of a geological formation that is lower than the surrounding peaks
	a bad or difficult situation or state of affairs
	(military) a written leave of absence

fly (adjective)	pass (adjective)
(British informal) not to be deceived or hoodwinked	of advancing the ball by throwing it

fly (verb)	pass (verb)
decrease rapidly and disappear	eliminate from the body
change quickly from one emotional state to another	come to pass
transport by aeroplane	disappear gradually
hit a fly	pass from physical life and lose all bodily attributes and functions necessary to sustain life
travel through the air; be airborne	grant authorization or clearance for
operate an airplane	transmit information
move quickly or suddenly	pass over, across, or through
run away quickly	go across or through
travel over (an area of land or sea) in an aircraft	travel past
travel in an airplane	pass into a specified state or condition; sink into
pass away rapidly	for time to move forward
cause to fly or float	cause to pass
be dispersed or disseminated	move past
display in the air or cause to float	place into the hands or custody of
	throw (a ball) to another player
	transfer to another; of rights or property
	be inherited by
	make laws, bills, etc. or bring into effect by legislation
	go unchallenged; be approved
	accept or judge as acceptable
	go successfully through a test or a selection process
	allow to go without comment or censure
	use up a period of time in a specific way
	be superior or better than some standard
	stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point