find out vs ascertain

find out and ascertain both are verbs.

Word	Noun	Adjective	Verb	Adverb
find out	No	No	Yes	No
ascertain	No	No	Yes	No

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

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

As verbs, find out and ascertain are synonyms defined as:

find out and ascertain: establish after a calculation, investigation, experiment, survey, or study

Other synonyms of find out include determine, find.

As verbs, find out and ascertain are synonyms defined as:

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

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

find out (verb)	ascertain (verb)
get to know or become aware of, usually accidentally	be careful or certain to do something; make certain of something
trap; especially in an error or in a reprehensible act	learn or discover with certainty
establish after a calculation, investigation, experiment, survey, or study	find out, learn, or determine with certainty, usually by making an inquiry or other effort
find out, learn, or determine with certainty, usually by making an inquiry or other effort	establish after a calculation, investigation, experiment, survey, or study