spy

noun 0.660

riflescope

noun 0.656

magnifying glass

noun 0.647

spyhole

noun 0.646

spy ring

noun 0.645

periscope

noun 0.636

telescope

noun 0.623

quizzing glass

noun 0.621

gunsight

noun 0.617

spectroscope

noun 0.608

eyeglass

noun 0.596

lorgnette

noun 0.588

goggle

noun 0.585

speculum

noun 0.582

microscope

noun 0.576

watch glass

noun 0.576

pair of binoculars

noun 0.573

glass eye

noun 0.565

glass

noun 0.564

searchlight

noun 0.556

peephole

noun 0.552

endoscope

noun 0.550

sextant

noun 0.546

magnifier

noun 0.546

ophthalmoscope

noun 0.545

perspective glass

noun 0.545

otoscope

noun 0.544

lookout

noun 0.538

optical glass

noun 0.535

spin glass

noun 0.534

espial

noun 0.533

spinnaker

noun 0.532

spider

noun 0.531

fisheye

noun 0.530

spymaster

noun 0.529

bioscope

noun 0.528

visor

noun 0.528

borescope

noun 0.526

scout

noun 0.526

gyroscope

noun 0.522

peep sight

noun 0.521

gaze

noun 0.520

snooper

noun 0.520

spyware

noun 0.520

simple microscope

noun 0.520

spicule

noun 0.518

spear gun

noun 0.517

spotter

noun 0.517

viewfinder

noun 0.516

stereoscope

noun 0.516

thermoscope

noun 0.516

wine glass

noun 0.515

lens

noun 0.515

pier glass

noun 0.515

eyespot

noun 0.515

observatory

noun 0.513

shot glass

noun 0.513

planisphere

noun 0.513

optic

noun 0.513

glance

noun 0.512

prism

noun 0.511

eagle eye

noun 0.511

sphinx

noun 0.511

scry

noun 0.511

kaleidoscope

noun 0.510

opera glass

noun 0.509

gastroscope

noun 0.509

private eye

noun 0.508

optical microscope

noun 0.507

crystal ball

noun 0.507

eye

noun 0.506

globe

noun 0.506

arthroscope

noun 0.505

oscilloscope

noun 0.505

spear

noun 0.505

spectrograph

noun 0.505

snipe

noun 0.505

stargazer

noun 0.504

fibrescope

noun 0.503

handspike

noun 0.503

goldeneye

noun 0.503

ogle

noun 0.502

refracting telescope

noun 0.502

sniper

noun 0.501

refractor

noun 0.501

eyepiece

noun 0.501