pupil vs educatee

pupil and educatee both are nouns.

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

As nouns, pupil and educatee are synonyms defined as:

pupil and educatee: a learner who is enrolled in an educational institution

Other synonyms of pupil include student.

pupil (noun)	educatee (noun)
the contractile aperture in the center of the iris of the eye; resembles a large black dot	a learner who is enrolled in an educational institution
a learner who is enrolled in an educational institution
a young person attending school (up through senior high school)