passer vs pupil

passer and pupil both are nouns.

Word	Noun	Adjective	Verb	Adverb
passer	Yes	No	No	No
pupil	Yes	No	No	No

As nouns, pupil is a hypernym of passer; that is, pupil is a word with a broader meaning than passer:

Other hypernyms of passer include educatee, student, examinee, testee.

passer (noun)	pupil (noun)
(football) a ball carrier who tries to gain ground by throwing a forward pass	the contractile aperture in the center of the iris of the eye; resembles a large black dot
a person who passes by casually or by chance	a learner who is enrolled in an educational institution
a student who passes an examination	a young person attending school (up through senior high school)
a person who passes as a member of a different ethnic or racial group