subterranean

adj 0.820

subterraneous

adj 0.807

terranean

adj 0.732

undersea

adj 0.717

undercover

adj 0.716

underneath

adj 0.713

under cover

adj 0.700

subsurface

adj 0.691

underwater

adj 0.688

overground

adj 0.673

underlying

adj 0.669

submarine

adj 0.669

underfloor

adj 0.666

semisubterranean

adj 0.663

under the counter

adj 0.656

hypogeous

adj 0.652

submerged

adj 0.652

underfoot

adj 0.644

unground

adj 0.637

ground

adj 0.635

undermost

adj 0.633

subbottom

adj 0.627

subjacent

adj 0.623

underhand

adj 0.623

downstairs

adj 0.621

buried

adj 0.613

clandestine

adj 0.612

subconscious

adj 0.612

unearthed

adj 0.611

under

adj 0.606

sub rosa

adj 0.604

hidden

adj 0.601

undercut

adj 0.599

undertail

adj 0.597

underline

adj 0.596

subcrustal

adj 0.594

deep

adj 0.591

deep-level

adj 0.591

down

adj 0.589

underly

adj 0.581

unconscious

adj 0.580

six feet under

adj 0.579

unseen

adj 0.579

underslung

adj 0.578

submersible

adj 0.577

downhole

adj 0.576

subglacial

adj 0.575

subaqueous

adj 0.574

underhanded

adj 0.573

subliminal

adj 0.571

occult

adj 0.570

unhidden

adj 0.569

underarm

adj 0.568

covert

adj 0.568

sunken

adj 0.566

undiscovered

adj 0.565

inner

adj 0.564

subdermal

adj 0.564

unlisted

adj 0.564

substratal

adj 0.563

hypogene

adj 0.561

inmost

adj 0.558

underlit

adj 0.553

subvisual

adj 0.553

secret

adj 0.553

trenchless

adj 0.552

unburied

adj 0.552

urban

adj 0.552

backstairs

adj 0.551

inside

adj 0.551

obscure

adj 0.550

interred

adj 0.550

downtown

adj 0.549

submergent

adj 0.549

unexcavated

adj 0.549

upstairs

adj 0.549

under arms

adj 0.549

incognito

adj 0.547

undergraduate

adj 0.546

invisible

adj 0.546

bottom

adj 0.546

upland

adj 0.546

subversive

adj 0.544

suburban

adj 0.544

infrasonic

adj 0.543

underrated

adj 0.542

submerse

adj 0.541

indoor

adj 0.541

deep-set

adj 0.540

subaltern

adj 0.539

submontane

adj 0.538

cut-and-cover

adj 0.537

dark

adj 0.537

submachine

adj 0.537

undetected

adj 0.536

recondite

adj 0.535

stealth

adj 0.535

innermost

adj 0.534

out of sight

adj 0.534

nether

adj 0.534