learn vs drill

learn is not a noun while drill is a noun.

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

As verbs, drill is a hyponym of learn; that is, drill is a word with a more specific, narrower meaning than learn:

Other hyponyms of learn include audit, prepare, train, exercise, practice, practise.

As verbs, drill is a hyponym of learn; that is, drill is a word with a more specific, narrower meaning than learn:

learn (noun)	drill (noun)
	systematic training by multiple repetitions
	(military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
	similar to the mandrill but smaller and less brightly colored
	a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)

learn (verb)	drill (verb)
gain knowledge or skills	learn by repetition
get to know or become aware of, usually accidentally	teach by repetition
be a student of a certain subject	train in the military, e.g., in the use of weapons
commit to memory; learn by heart	undergo military training or do military exercises
impart skills or knowledge to	make a hole, especially with a pointed power or hand tool
find out, learn, or determine with certainty, usually by making an inquiry or other effort