bottom

дно имя прилагательное:

нижний (lower, bottom, under, inferior, nether, caudal)

последний (last, latest, latter, recent, final, bottom)

низкий (low, lower, poor, deep, short, bottom)

основной (main, BASIC, key, primary, fundamental, bottom)

базисный (basic, base, bottom, attributive)

имя существительное:

дно (bottom, bed, underworld)

нижняя часть (bottom, underside, underneath, foot, sole, toe)

днище (bottom, end, bilge, bulge)

основание (base, basis, reason, bottom, foundation, ground)

низ (bottom)

конец (end, ending, stop, finish, last, bottom)

зад (ass, rear, backside, bottom, behind, bum)

грунт (priming, ground, soil, Earth, bottom, dirt)

суть (point, core, substance, heart, gist, bottom)

основа (warp, basis, base, foundation, framework, bottom)

фундамент (foundation, basement, base, groundwork, footing, bottom)

почва (soil, ground, land, earth, bedrock, bottom)

осадок (precipitate, sediment, residue, sludge, deposit, bottom)

задняя часть (back end, hindquarters, tail, bottom, hind quarter, haunch)

сиденье (seat, bucket seat, place, bottom, space, pew)

причина (cause, reason, why, root, ground, bottom)

долина (valley, lowland, vale, dale, glen, bottom)

судно (vessel, ship, boat, craft, bedpan, bottom)

подонки (dregs, vermin, lees, dross, bottom, refuse)

выносливость (endurance, stamina, hardiness, staying power, durability, bottom)

подстилающая порода (bottom, seat)

подводная часть корабля (bottom)

запас жизненных сил (stamina, bottom)

низменность (lowland, low ground, bottom)

подводная часть судна (careen, bottom)

предлог:

под (under, below, in, beneath, underneath, bottom)

глагол:

основывать (base, found, establish, ground, rest, bottom)

основываться (build, found, rest, bottom, lean, repose)

вникнуть (bottom)

приделывать дно (bottom)

измерять глубину (fathom, bottom, plumb, Sound)

доискаться причины (bottom)

касаться дна (bottom)

добираться до сути дела (think through, bottom)

строить (build, construct, build up, frame, parade, bottom)