exercise vs use

exercise and use both are nouns.

Word	Noun	Adjective	Verb	Adverb
exercise	Yes	No	Yes	No
use	Yes	No	Yes	No

As nouns, exercise and use are synonyms defined as:

Other synonyms of exercise include employment, usage, utilisation, utilization.

As verbs, use is a hypernym of exercise; that is, use is a word with a broader meaning than exercise:

exercise: put to use
use: put into service; make work or employ for a particular purpose or for its inherent or natural purpose

Other hypernyms of exercise include apply, employ, utilise, utilize.

exercise (noun)	use (noun)
the activity of exerting your muscles in various ways to keep fit	the act of using
a task performed or problem solved in order to develop skill or understanding	(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition
systematic training by multiple repetitions	exerting shrewd or devious influence especially for one's own advantage
the act of using	what something is used for
an action, often used negatively and without consequences	a particular service
(usually plural) a ceremony that involves processions and speeches	(law) the exercise of the legal right to enjoy the benefits of owning property
	(economics) the utilization of economic goods to satisfy needs or in manufacturing

exercise (verb)	use (verb)
do physical exercise	put into service; make work or employ for a particular purpose or for its inherent or natural purpose
give a workout to	take or consume (regularly or habitually)
learn by repetition	use up (resources or materials)
put to use	habitually do something or be in a certain state or place (use only in the past tense)
carry out or practice; as of jobs and professions	avail oneself to
	seek or achieve an end by using to one's advantage