• to be in cahoots with sy
• disloyal, rat, snitcher, squealer, telltale, traitor, traitorous, treacherous
• foul play, perfidy, policy of scuttle, treachery, treason
• to blow, blew, blown, to peep, to sneak
• to betray, to disclose, to display, to give away, to let on, to let out, to manifest, to scream, to sell, sold, to spill the beans, to uncover
• betrayal, disclosure, divulgation, giveaway
• treasonable, treasonous
• capital treason, high treason
• to sneak on sy, to snitch on sy