2. (verb)see, check, insure, see to it, ensure, control, ascertain, assure be careful or certain to do something; make certain of something Synonyms: guarantee, ensure, project, interpret, verify, look, experience, tick off, visualise, fit, gibe, assure, image, hold, run across, moderate, learn, checker, condition, mark off, run into, discover, escort, stop, examine, pick up, visit, reckon, consider, tally, come across, get a line, hold in, suss out, get wind, check off, check over, take care, match, check up on, control, look into, ascertain, mark, command, insure, attend, promise, date, realize, go over, train, check, hold back, underwrite, meet, go out, witness, manipulate, fancy, catch, construe, find out, see, discipline, tell, check into, regard, visualize, picture, find, go through, take in, correspond, curb, secure, view, keep in line, arrest, hear, cover, contain, operate, get word, envision, determine, figure, encounter, retard, crack, turn back, reassure, chequer, watch, see to it, break, understand, check out, master, go steady, tick, realise, jibe, agree, delay
4. (verb)ascertain learn or discover with certainty Synonyms: see, find, watch, find out, check, ensure, insure, assure, control, see to it, determine, learn
Synonyms, Thesaurus & Antonyms of 'ascertain'
English Synonyms and Antonyms
1. ascertain Of human actions or character, detect is used, almost without exception, in a bad sense; discover may be used in either the good or the bad sense, oftener in the good; he was detected in a frau Synonyms: discover, ascertain, detect, disclose, ferret out, find out, descry, discern, expose, find, invent
Synonyms for ascertain 
