learn vs ascertain

learn and ascertain both are verbs.

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

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

Other hyponyms of learn include get the goods, wise up, catch, trip up.

As verbs, learn and ascertain are synonyms defined as:

learn and ascertain: find out, learn, or determine with certainty, usually by making an inquiry or other effort

Other synonyms of learn include check, determine, find out, see, watch.

learn (verb)	ascertain (verb)
gain knowledge or skills	be careful or certain to do something; make certain of something
get to know or become aware of, usually accidentally	learn or discover with certainty
be a student of a certain subject	find out, learn, or determine with certainty, usually by making an inquiry or other effort
commit to memory; learn by heart	establish after a calculation, investigation, experiment, survey, or study
impart skills or knowledge to
find out, learn, or determine with certainty, usually by making an inquiry or other effort