subbase

noun 0.723

slab on grade

noun 0.678

roadbed

noun 0.650

subfloor

noun 0.647

subsurface

noun 0.633

subsoil

noun 0.614

substratum

noun 0.601

roadbase

noun 0.596

ground

noun 0.588

ground floor

noun 0.585

grade

noun 0.585

subframe

noun 0.584

substructure

noun 0.583

underground

noun 0.578

grading

noun 0.574

gradation

noun 0.569

basement

noun 0.568

groundwork

noun 0.562

sublayer

noun 0.557

bedrock

noun 0.557

undersurface

noun 0.557

substrate

noun 0.555

sub

noun 0.555

subordinate

noun 0.554

underlying

noun 0.553

sub-bass

noun 0.548

second grade

noun 0.548

grav

noun 0.548

grounds

noun 0.546

grader

noun 0.544

ground cover

noun 0.542

grounder

noun 0.540

underpinning

noun 0.537

undercarriage

noun 0.535

underpass

noun 0.534

subdifferential

noun 0.531

graveside

noun 0.531

grade one

noun 0.530

ground ball

noun 0.529

groundsheet

noun 0.528

soil

noun 0.527

souterrain

noun 0.525

subordination

noun 0.525

underlay

noun 0.525

subdivision

noun 0.525

underlayer

noun 0.524

subsidence

noun 0.523

underneath

noun 0.522

hypogeum

noun 0.522

subsoiler

noun 0.521

first grade

noun 0.520

grave

noun 0.520

grass roots

noun 0.520

ground ice

noun 0.519

underplating

noun 0.519

hardground

noun 0.518

undersection

noun 0.518

subduction

noun 0.518

underside

noun 0.516

underbody

noun 0.515

underfloor

noun 0.514

subgenus

noun 0.514

ground truth

noun 0.514

subcontract

noun 0.513

basis

noun 0.513

gradability

noun 0.512

underlier

noun 0.512

grade crossing

noun 0.512

subpage

noun 0.511

subgovernment

noun 0.511

gravel

noun 0.511

undergrad

noun 0.511

subphylum

noun 0.511

underpart

noun 0.510

underling

noun 0.510

subdomain

noun 0.509

subway

noun 0.509

subprime

noun 0.509

undergrowth

noun 0.508

secondary

noun 0.507

grade school

noun 0.507

subspace

noun 0.505

fundament

noun 0.505

subform

noun 0.505

overground

noun 0.504

geogrid

noun 0.504

terrain

noun 0.502

subgraph

noun 0.501

bed load

noun 0.501

street level

noun 0.500