subsoiler

noun 0.733

soil

noun 0.716

topsoil

noun 0.686

subsurface

noun 0.684

subbase

noun 0.634

subgrade

noun 0.614

subfloor

noun 0.585

underground

noun 0.573

souterrain

noun 0.565

bedrock

noun 0.565

dirt

noun 0.556

substructure

noun 0.553

soil science

noun 0.545

sublayer

noun 0.545

sub-bass

noun 0.545

substratum

noun 0.543

understory

noun 0.534

basement

noun 0.534

subsolution

noun 0.533

hypogeum

noun 0.531

solum

noun 0.522

paleosol

noun 0.521

undersurface

noun 0.521

ground ice

noun 0.520

loam

noun 0.518

underlayer

noun 0.518

aquifer

noun 0.517

subfossil

noun 0.515

soil mechanics

noun 0.515

pedology

noun 0.511

soil pipe

noun 0.510

soil fertility

noun 0.509

subsidence

noun 0.509

saprolite

noun 0.508

underneath

noun 0.508

subwoofer

noun 0.507

black cotton soil

noun 0.506

sub

noun 0.506

underpart

noun 0.505

soil chemistry

noun 0.505

pedosphere

noun 0.504

soakaway

noun 0.504

soil physics

noun 0.504

underlay

noun 0.503

old sod

noun 0.503

loess

noun 0.503

subduction

noun 0.502

underlying

noun 0.502

soil management

noun 0.501