Synonyms for Betray:

n.

abuse, adhere, disappoint, double cross, grind down, inform, kick around, let down, mistreat, oppress, reject, sell out, support, trample, trick, turn in, cross up, stab in the back, hit out, shove around, do someone wrong. adapt, backpedal, capitulate, convert, corrupt, move on, revise, seduce, change your mind, move with the times, see reason/sense. offer, render, surrender, uncover, voice, make known, express yourself, make no secret of something. leak, offload, trust, spill the beans, lay something bare, let (it) slip. blab, denote, identify, indicate, mean, proclaim, represent, show, signify, spill, stand for, symbolize, tell, unveil. bamboozle, beguile, bluff, burden, disadvantage, embarrass, four flush, have, hold back, honest, hoodwink, humbug, inhibit, plague, throttle, take in, bring up against, count against. betray (noun)
bewray, cheat, cheat on, cuckold, deceive, denounce, fail, give away, grass, lead astray, peach, rat, sell, shop, snitch, stag, tell on, wander.

v.

be disloyal (verb)
abandon, bluff, cross, deceive, delude, desert, let down, mislead, seduce, sell out, trick, turn in, take in, stab in the back.
communication (verb)
bewray.
deceive (verb)
bilk, cheat, counterfeit, deceive, defraud, delude, dupe, falsify, fool, forge, mislead, swindle.
divulge, expose information (verb)
give away, inform, show, snitch, spill, tell, tell on, uncover, make known.
emotion (verb)
fail.
renounce (verb)
abandon, abdicate, abnegate, backslide, cross, defect, deny, desert, disavow, renounce, retract.
social (verb)
sell.

Other synonyms:

denote, four flush, identify, offload, symbolize, tell. bluff, hoodwink, inform, signify, stand for. bamboozle, beguile, blab, indicate, leak, proclaim, unveil. spill. represent, uncover. mean. trick. have. blab
peach, tell on.
cheat
double cross.
deceive
bluff, cross up.
double cross
stab in the back.
fool
beguile.
reveal
give away, spill, unveil.
snitch
snitch.
Other relevant words:
abuse, adapt, adhere, backpedal, bamboozle, beguile, bewray, blab, bluff, burden, capitulate, cheat on, convert, corrupt, cuckold, denote, denounce, disadvantage, disappoint, double cross, embarrass, fail, four flush, give away, grass, have, honest, hoodwink, humbug, identify, indicate, inform, inhibit, lead astray, leak, let down, mean, mistreat, offer, offload, oppress, peach, plague, proclaim, rat, reject, render, represent, revise, seduce, sell, sell out, shop, show, signify, snitch, spill, stag, surrender, symbolize, tell, tell on, throttle, trample, trick, trust, turn in, uncover, unveil, voice, wander, spill the beans, cross up, make known, stab in the back.

Usage examples for betray

  1. But how much for your own sake you are obliged to keep your counsel, you will very soon find out if you betray it." – Springhaven A Tale of the Great War by R. D. Blackmore
  2. Do you promise not to betray us?" – 'Firebrand' Trevison by Charles Alden Seltzer
  3. Not that I fancied for a moment he'd betray me. – In the Bishop's Carriage by Miriam Michelson