pass vs pass on

pass is a noun but pass on is not a noun.

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

As verbs, pass and pass on are synonyms defined as:

Other synonyms of pass include communicate, pass along, put across.

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

Other hypernyms of pass include advance, go on, march on, move on, progress.

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

Other hypernyms of pass include advance, go on, march on, move on, progress.

As verbs, pass and pass on are synonyms defined as:

Other synonyms of pass include give, hand, reach, turn over.

pass (noun)	pass on (noun)
(sports) the act of throwing the ball to another member of your team
a usually brief attempt
(American football) a play that involves one player throwing the ball to a teammate
(baseball) an advance to first base by a batter who receives four balls
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

pass (adjective)	pass on (adjective)
of advancing the ball by throwing it

pass (verb)	pass on (verb)
eliminate from the body	transmit information
come to pass	cause to be distributed
disappear gradually	move forward, also in the metaphorical sense
pass from physical life and lose all bodily attributes and functions necessary to sustain life	give to or transfer possession of
grant authorization or clearance for	place into the hands or custody of
transmit information	transmit (knowledge or skills)
pass over, across, or through	refer to another person for decision or judgment
go across or through
travel past
pass into a specified state or condition; sink into
for time to move forward
cause to pass
move past
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