Synonyms for Trainee:

n.

career woman, designated hitter, commuter, ancillary, breadwinner, cowboy, apparatchik, auxiliary, desk person, duty officer. learner (noun)
disciple, learner, apprentice, freshman, scholar, neophyte, student, pupil.
neophyte (noun)
freshman.
trainee (noun)
pupil, learner, neophyte, apprentice, student.

Other synonyms:

Other relevant words:
ancillary, auxiliary, apparatchik, commuter, breadwinner, cowboy.