passer vs testee

passer and testee both are nouns.

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

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

passer: a student who passes an examination
testee: someone who is tested (as by an intelligence test or an academic examination)

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

passer (noun)	testee (noun)
(football) a ball carrier who tries to gain ground by throwing a forward pass	someone who is tested (as by an intelligence test or an academic examination)
a person who passes by casually or by chance
a student who passes an examination
a person who passes as a member of a different ethnic or racial group