countersurveillance

noun 0.780

counterespionage

noun 0.749

countersubversive

noun 0.737

spy ring

noun 0.681

countersign

noun 0.659

counterintelligence

noun 0.641

countersink

noun 0.638

spy

noun 0.636

counter

noun 0.627

spymaster

noun 0.615

secret agent

noun 0.607

countermeasure

noun 0.590

counterterrorist

noun 0.586

spycraft

noun 0.583

counter-attack

noun 0.581

anticounterfeiting

noun 0.576

counterfeiter

noun 0.573

countermark

noun 0.572

countersuit

noun 0.566

undercover

noun 0.560

counterterror

noun 0.559

counterinsurgency

noun 0.557

counterman

noun 0.557

counterfort

noun 0.556

scintillation counter

noun 0.555

double agent

noun 0.554

covert

noun 0.554

counterforce

noun 0.554

card counter

noun 0.553

counterfire

noun 0.550

counterstrike

noun 0.549

interceptor

noun 0.545

spotter

noun 0.545

foreign agent

noun 0.543

countersignature

noun 0.542

bean counter

noun 0.535

countertop

noun 0.533

counterterm

noun 0.532

countergift

noun 0.529

antiterrorist

noun 0.526

counterrevolutionary

noun 0.526

counts

noun 0.525

counteract

noun 0.524

covertness

noun 0.522

countershaft

noun 0.520

countercheck

noun 0.515

counterstrategy

noun 0.515

counterplot

noun 0.514

industrial espionage

noun 0.514

countertrade

noun 0.513

cryptanalyst

noun 0.513

spyware

noun 0.512

eavesdropper

noun 0.511

counter-offensive

noun 0.511

case officer

noun 0.510

counterpunch

noun 0.509

counterfeit

noun 0.509

intelligence asset

noun 0.509

counterpart

noun 0.507

undercount

noun 0.506

deep cover

noun 0.506

triple agent

noun 0.505

saboteur

noun 0.505

sleeper agent

noun 0.502