defector
noun
[ dɪˈfɛktə ]
• a person who has abandoned their country or cause in favour of an opposing one.
• "staff interviewed escapees and defectors to the West"
Similar:
deserter,
turncoat,
traitor,
rebel,
renegade,
tergiversator,
apostate,
recreant,
Judas,
quisling,
rat,
