snooping

noun 0.627

eavesdropping

noun 0.621

eavesdrop

noun 0.581

peeping

noun 0.569

eavesdropper

noun 0.551

countersurveillance

noun 0.545

surveillance

noun 0.544

overhearing

noun 0.527

mass surveillance

noun 0.518

shouldering

noun 0.518

ogling

noun 0.516

shadowing

noun 0.510

video surveillance

noun 0.509

lookout

noun 0.508

piggybacking

noun 0.507

observing

noun 0.505

skimming

noun 0.501

stalking

noun 0.500