exercising vs physical exertion

exercising and physical exertion both are nouns.

Word	Noun	Adjective	Verb	Adverb
exercising	Yes	No	No	No
physical exertion	Yes	No	No	No

As nouns, exercising and physical exertion are synonyms defined as:

exercising and physical exertion: the activity of exerting your muscles in various ways to keep fit

Other synonyms of exercising include exercise, physical exercise, workout.

exercising (noun)	physical exertion (noun)
the activity of exerting your muscles in various ways to keep fit	the activity of exerting your muscles in various ways to keep fit