opusculum

noun 0.771

operculum

noun 0.618

oculus

noun 0.616

osculation

noun 0.605

osculating circle

noun 0.605

ostium

noun 0.604

stoma

noun 0.590

orifice

noun 0.568

ocular

noun 0.550

ovular

noun 0.546

occlusal

noun 0.544

loculus

noun 0.542

operculate

noun 0.542

sulcus

noun 0.539

ocellus

noun 0.534

orbicularis

noun 0.532

opuscule

noun 0.532

occluder

noun 0.526

punctum

noun 0.525

foramen ovale

noun 0.522

coloboma

noun 0.522

bocal

noun 0.520

ossicle

noun 0.519

incisura

noun 0.518

oral cavity

noun 0.518

lacune

noun 0.517

aperture

noun 0.517

preoperculum

noun 0.513

eyehole

noun 0.511

opus

noun 0.511

scapha

noun 0.509

foramen

noun 0.509

canaliculus

noun 0.509

bocca

noun 0.508

piriform aperture

noun 0.507

saccule

noun 0.507

lacuna

noun 0.506

blastopore

noun 0.506

cavity

noun 0.506

oval

noun 0.506

ventriculus

noun 0.504

knothole

noun 0.503

proloculus

noun 0.502

alveolus

noun 0.502

vestibule

noun 0.501

occiput

noun 0.500