WordNet: sleeper

a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal

• domain: topic act of terrorism, terrorism, terrorist act

• hypernym diversionist, saboteur, wrecker

• hypernym spy, undercover agent

• hypernym terrorist

• member holonym sleeper nest

sleeper

• (suomi) myyrä (synonyymi)

• (suomi) agentti (synonyymi)