bystander

noun 0.812

onlooker

noun 0.682

stander

noun 0.640

watcher

noun 0.638

watchman

noun 0.633

witness

noun 0.608

spectator

noun 0.606

overlooker

noun 0.599

standby

noun 0.595

observer

noun 0.594

upstand

noun 0.593

eyewitness

noun 0.569

rescuer

noun 0.568

nightwatchman

noun 0.563

witness stand

noun 0.558

watchdog

noun 0.558

spotter

noun 0.554

first responder

noun 0.553

night watchman

noun 0.552

lookout

noun 0.551

assister

noun 0.551

waker

noun 0.542

waitperson

noun 0.541

kickstand

noun 0.540

offsider

noun 0.535

intervenor

noun 0.535

sitter

noun 0.531

stand

noun 0.529

nonparticipant

noun 0.528

lifeguard

noun 0.528

stand-in

noun 0.527

birdwatcher

noun 0.525

vigilante

noun 0.523

sentinel

noun 0.522

cornerman

noun 0.522

looker

noun 0.522

attendant

noun 0.519

sentry

noun 0.517

defender

noun 0.516

guardian

noun 0.516

survivor

noun 0.514

testifier

noun 0.513

watchkeeping

noun 0.512

earwitness

noun 0.510

kibitzer

noun 0.509

standee

noun 0.508

nightstand

noun 0.507

standoff

noun 0.506

lifesaver

noun 0.504

guard

noun 0.504

upholder

noun 0.504

surveillant

noun 0.503

well-wisher

noun 0.502