Nouns

(n)exercise, exercising, physical exercise, physical exertion, workoutthe activity of exerting your muscles in various ways to keep fit“the doctor recommended regular exercise”, “he did some exercising”, “the physical exertion required by his work kept him fit”
(n)use, usage, utilization, utilisation, employment, exercisethe act of using“he warned against the use of narcotic drugs”, “skilled in the utilization of computers”
(n)exercise, practice, drill, practice session, recitationsystematic training by multiple repetitions“practice makes perfect”
(n)exercise, examplea task performed or problem solved in order to develop skill or understanding“you must work the examples at the end of each chapter in the textbook”
(n)exercise(usually plural) a ceremony that involves processions and speeches“academic exercises”
(n)exercisean action, often used negatively and without consequences“an exercise in futility”, “an exercise in cheap talk”

Verbs

(v)exert, exerciseput to use“exert one's power or influence”
(v)practice, practise, exercise, docarry out or practice; as of jobs and professions“practice law”
(v)exercise, work, work outgive a workout to“Some parents exercise their infants”, “My personal trainer works me hard”, “work one's muscles”, “this puzzle will exercise your mind”
(v)exercise, work outdo physical exercise“She works out in the gym every day”
(v)drill, exercise, practice, practiselearn by repetition“We drilled French verbs every day”, “Pianists practice scales”