drill vs exercise

drill and exercise both are nouns.

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

As nouns, drill and exercise are synonyms defined as:

Other synonyms of drill include practice, practice session, recitation.

As verbs, drill and exercise are synonyms defined as:

Other synonyms of drill include practice, practise.

drill (noun)	exercise (noun)
systematic training by multiple repetitions	the activity of exerting your muscles in various ways to keep fit
(military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms	a task performed or problem solved in order to develop skill or understanding
similar to the mandrill but smaller and less brightly colored	systematic training by multiple repetitions
a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)	the act of using
	an action, often used negatively and without consequences
	(usually plural) a ceremony that involves processions and speeches

drill (verb)	exercise (verb)
learn by repetition	do physical exercise
teach by repetition	give a workout to
train in the military, e.g., in the use of weapons	learn by repetition
undergo military training or do military exercises	put to use
make a hole, especially with a pointed power or hand tool	carry out or practice; as of jobs and professions