ascertain vs get a line

ascertain and get a line both are verbs.

Word	Noun	Adjective	Verb	Adverb
ascertain	No	No	Yes	No
get a line	No	No	Yes	No

As verbs, get a line is a hypernym of ascertain; that is, get a line is a word with a broader meaning than ascertain:

Other hypernyms of ascertain include discover, find out, get wind, get word, hear, learn, pick up, see.

ascertain (verb)	get a line (verb)
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
find out, learn, or determine with certainty, usually by making an inquiry or other effort
establish after a calculation, investigation, experiment, survey, or study