THESAURUS
underneath
bed, bedrock, belly, below, beneath, bottom, bottom side, breech, buttocks, clandestine, covert, downside, fundament, furtive, hardpan, hole-and-corner, lower side, lowest layer, lowest level, neath, nether side, nethermost level, rock bottom, sole, stealthy, subordinate to, substratum, surreptitious, under, under-the-table, underbelly, undercover, underlayer, underside
ROGET THESAURUS
underneath
Lowness
N
lowness, debasement, depression, prostration, depression, molehill, lowlands, basement floor, ground floor, rez de chaussee, cellar, hold, bilge, feet, heels, low water, low tide, ebb tide, neap tide, spring tide, low, neap, debased, nether, nether most, flat, level with the ground, lying low, crouched, subjacent, squat, prostrate, under, beneath,
underneath, below, downwards, adown, at the foot of, under foot, under ground, down stairs, below stairs, at a low ebb, below par.