exercise vs warm up

exercise and warm up both are nouns.

Word	Noun	Adjective	Verb	Adverb
exercise	Yes	No	Yes	No
warm up	Yes	No	Yes	No

As verbs, warm up is a hyponym of exercise; that is, warm up is a word with a more specific, narrower meaning than exercise:

exercise: do physical exercise
warm up: make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity

Other hyponyms of exercise include limber up, loosen up, train, tumble, strengthen, tone, tone up, press, weight-lift, weightlift.

exercise (noun)	warm up (noun)
the activity of exerting your muscles in various ways to keep fit	performing mild exercises to prepare for some more strenuous activity
a task performed or problem solved in order to develop skill or understanding
systematic training by multiple repetitions
the act of using
an action, often used negatively and without consequences
(usually plural) a ceremony that involves processions and speeches

exercise (verb)	warm up (verb)
do physical exercise	make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity
give a workout to	cause to do preliminary exercises so as to stretch the muscles
learn by repetition	get warm or warmer
put to use	become more friendly or open
carry out or practice; as of jobs and professions	run until the normal working temperature is reached