Synonyms for Workout:

n.

circuit training, tryout, aerobics, calisthenics, the burn, bend, bodybuilding, aerobic, boxercise, aquarobics, chin up, discipline, rehearsal. gymnastics, work. exercise, practice (noun)
work, rehearsal, tryout.
workout (noun)
physical exertion, exercising, physical exercise, exercise.

Other synonyms:

calisthenics. Other relevant words:
gymnastics, aerobics, tryout, discipline, calisthenics, work, bodybuilding, rehearsal.