Synonyms for Warn:
n.whistle, lecture, sound/raise the alarm, portend, warn off. •forewarn (noun)
give the alarm, predict, tip off, study at adviseadvise, offer a word of caution, remind, put on guard, forearm, urge, make red lights flash, signal, forbid, give the high sign, cry wolf, give notice, put on the alert, prepare, put wise, prepare for the worst, remonstrate, sound the alarm, apprise, start bells ringing, read the riot act, cry havoc.
enjoin, exhort, Forewarn, alert.
•give notice of possible occurrence (verb)
instruct, exhort, prompt, admonish, suggest, cry wolf, inform, tip off, forbid, hint, caution, apprise, prepare, guide, advise, remonstrate, recommend, signal, put on guard, give the high sign, counsel, alert, urge, threaten, direct, remind, forearm, advocate, Forewarn, predict, notify, enjoin.
frighten, hint, harass, forebode, scare, intimidate, torment, browbeat, bulldoze, bully, threaten.