spyglass

noun 0.636

borescope

noun 0.628

riflescope

noun 0.627

telescope

noun 0.624

endoscope

noun 0.597

spectroscope

noun 0.578

proctoscope

noun 0.573

microscope

noun 0.564

oscilloscope

noun 0.559

snorkel

noun 0.557

stereoscope

noun 0.557

bioscope

noun 0.556

otoscope

noun 0.555

pericope

noun 0.555

episcope

noun 0.554

peephole

noun 0.553

spyhole

noun 0.552

ophthalmoscope

noun 0.546

thermoscope

noun 0.542

fibrescope

noun 0.538

porthole

noun 0.537

kaleidoscope

noun 0.533

submarine

noun 0.531

fiberscope

noun 0.531

prism

noun 0.527

perch

noun 0.527

laparoscope

noun 0.527

siphon

noun 0.525

visor

noun 0.525

radarscope

noun 0.524

peep sight

noun 0.524

fisheye

noun 0.523

iconoscope

noun 0.521

arthroscope

noun 0.520

observation deck

noun 0.518

colonoscope

noun 0.517

observatory

noun 0.515

ureteroscope

noun 0.515

lookout

noun 0.514

bathysphere

noun 0.513

cystoscope

noun 0.513

scuba

noun 0.512

esophagoscope

noun 0.512

scupper

noun 0.511

speculum

noun 0.511

scope

noun 0.510

bathyscaphe

noun 0.510

submersible

noun 0.509

laryngoscope

noun 0.508

polariscope

noun 0.507

parabolic mirror

noun 0.507

hysteroscope

noun 0.507

peek

noun 0.505

goggle

noun 0.504

porpoise

noun 0.502

resectoscope

noun 0.502