Synonyms of 'espial'

catching, counterespionage, counterintelligence, detection, determination, disclosure, discovery, espionage, excavation, exhumation, exposure, find, finding, following, intelligence, invention, location, lookout, note, notice, observance, observation, recognition, regard, respect, revelation, secret police, secret service, serendipity, stakeout, strike, surveillance, tailing, trouvaille, trove, viewing, watch, wiretap