preoperculum

noun 0.777

preopercular

noun 0.746

operculate

noun 0.741

preopercle

noun 0.731

opusculum

noun 0.706

osculum

noun 0.618

coverlid

noun 0.547

oper

noun 0.546

palpebral

noun 0.544

opus operatum

noun 0.539

valva

noun 0.535

peridium

noun 0.528

carapace

noun 0.526

clamshell

noun 0.525

involucrum

noun 0.523

operative

noun 0.520

velum

noun 0.519

periostracum

noun 0.516

labium

noun 0.515

opus

noun 0.512

clipeus

noun 0.510

occluder

noun 0.510

auricle

noun 0.510

stoma

noun 0.510

cupule

noun 0.507

opal

noun 0.505

eyelid

noun 0.503

tympanum

noun 0.503

orbicularis

noun 0.501