counterspy

noun 0.780

counterespionage

noun 0.701

countersubversive

noun 0.668

surveillance

noun 0.625

counterintelligence

noun 0.622

mass surveillance

noun 0.618

countermeasure

noun 0.604

anticounterfeiting

noun 0.601

video surveillance

noun 0.595

countersign

noun 0.585

biosurveillance

noun 0.581

surveillance camera

noun 0.572

countersuit

noun 0.561

counter-attack

noun 0.554

countersink

noun 0.549

counterinsurgency

noun 0.548

counterterror

noun 0.547

shoulder surfing

noun 0.545

spy ring

noun 0.541

counterforce

noun 0.534

undercover

noun 0.530

covertness

noun 0.525

covert

noun 0.523

counterstrategy

noun 0.523

countermark

noun 0.518

wiretapping

noun 0.514

spycraft

noun 0.512

countergift

noun 0.509

counterstrike

noun 0.508

cybersecurity

noun 0.505

counter-offensive

noun 0.503

counterculture

noun 0.503