subsoil

• POS: Noun, Verb (transitive)
• HYPHEN: sub=soil

CIDE DICTIONARY

subsoil, n. 

 The bed, or stratum, of earth which lies immediately beneath the surface soil.  [1913 Webster]

Subsoil plow, a plow having a share and standard but no moldboard. It follows in the furrow made by an ordinary plow, and loosens the soil to an additional depth without bringing it to the surface. Knight.

subsoil, v. t. 

 To turn up the subsoil of.  [1913 Webster]

OXFORD DICTIONARY

subsoil, n. soil lying immediately under the surface soil (opp. TOPSOIL).

THESAURUS

subsoil

acres, alluvion, alluvium, arable land, clay, clod, crust, dirt, dry land, dust, earth, freehold, glebe, grassland, ground, land, landholdings, lithosphere, marginal land, marl, mold, real estate, real property, region, regolith, sod, soil, subaerial deposit, terra, terra firma, terrain, territory, the country, topsoil, woodland

ROGET THESAURUS

subsoil

Interiority

N interiority, inside, interior, interspace, subsoil, substratum, intrados, contents, substance, pith, marrow, backbone, heart, bosom, breast, abdomen, vitals, viscera, entrails, bowels, belly, intestines, guts, chitterings, womb, lap, penetralia, recesses, innermost recesses, cave, interior, internal, inner, inside, inward, intraregarding, inmost, innermost, deep seated, gut, intestine, intestinal, inland, subcutaneous, abdominal, coeliac, endomorphic, interstitial, inwrought, inclosed, home, domestic, indoor, intramural, vernacular, endemic, internally, inwards, within, in, inly, here in, there in, where in, ab intra, withinside, in doors, within doors, at home, in the bosom of one's family.

Land

N land, earth, ground, dry land, terra firma, continent, mainland, peninsula, chersonese, delta, tongue of land, neck of land, isthmus, oasis, promontory, highland, coast, shore, scar, strand, beach, playa, bank, lea, seaboard, seaside, seabank, seacoast, seabeach, ironbound coast, loom of the land, derelict, innings, alluvium, alluvion, ancon, riverbank, river bank, levee, soil, glebe, clay, loam, marl, cledge, chalk, gravel, mold, subsoil, clod, clot, rock, crag, acres, real estate, landsman, earthy, continental, midland, coastal, littoral, riparian, alluvial, terrene, landed, predial, territorial, geophilous, ripicolous, ashore, on shore, on land.