Another word for betray
To deliver into the hands of an enemy
play false, break faith (with), inform on, inform against, turn in, commit treason, turn informer, delude, break one's promise, be false to, be false-hearted to, be disloyal to, go over to the enemy, trick, let down, disappoint, deceive, sell down the river*, play Judas*, give the Judas kiss to*, double-cross*, deliver up*, sell out*, stab in the back*, bite the hand that feeds one*, cross up*, turn state's evidence; see also deceive, inform 2.
To lead astray
Another word for betrayverb
To be treacherous to:double-cross. (Slang) rat (on), sell out. Idiom: sell down the river . See trust
To disclose in a breach of confidence:blab, divulge, expose, give away, let out, reveal, tell, uncover, unveil. (Informal) spill. (Archaic) discover. Idioms: let slip, let the cat out of the bag, spill the beans, tell all. See show
To cause to accept what is false, especially by trickery or misrepresentation:beguile, bluff, cozen, deceive, delude, double-cross, dupe, fool, hoodwink, humbug, mislead, take in, trick. (Informal) bamboozle, have. (Slang) four-flush. Idioms: lead astray, play false, pull the wool over someone's eyes, put something over on, take for a ride. See honest