eavesdropping

noun 0.932

eavesdropper

noun 0.884

overhearing

noun 0.733

snooping

noun 0.627

wiretapping

noun 0.600

peeping

noun 0.594

earshot

noun 0.592

shoulder surfing

noun 0.581

sneak

noun 0.572

wiretap

noun 0.569

gossip

noun 0.565

spy ring

noun 0.563

gossiping

noun 0.559

listening

noun 0.549

snooper

noun 0.548

spy

noun 0.540

encroach

noun 0.539

earwitness

noun 0.537

listen

noun 0.536

listening post

noun 0.533

fly on the wall

noun 0.533

hearing

noun 0.528

surveillance

noun 0.527

whisper

noun 0.523

tattle

noun 0.521

intruding

noun 0.521

gossiper

noun 0.521

nosiness

noun 0.518

observing

noun 0.518

stealth

noun 0.517

skulk

noun 0.515

lurker

noun 0.513

covert

noun 0.513

whispering

noun 0.513

hearer

noun 0.511

industrial espionage

noun 0.510

earpiece

noun 0.509

privy

noun 0.509

conniver

noun 0.506

undercover

noun 0.506

trespassing

noun 0.505

kibitzing

noun 0.502