THESAURUS
Descend
advance, alight, ascend, assault, attack, back, back up, bank, be shamed, budge, cant, careen, cascade, cataract, change, change hands, change ownership, change place, circle, climb, climb down, collapse, come down, come in, condescend, crash, crash-land, decline, degenerate, deign, derogate, descend on, devolve, dip, dip down, disimprove, disintegrate, ditch, down, downwind, drop, drop down, drop off, ebb, fall, fall away, fall down, fall into disrepute, fall off, flow, get down, get over, go, go around, go down, go downhill, go round, go sideways, go uphill, grade, gravitate, gyrate, head, incline, incur discredit, incur disesteem, incur disgrace, invade, keel, land, lead, lean, level off, light, list, lose altitude, lose caste, lose countenance, lose credit, lose face, lower, lower oneself, mount, move, move over, overshoot, pancake, parachute, pass on, pitch, plummet, plunge, point, pounce, pounce on, pounce upon, pour down, precipitate, progress, rain, rake, regress, retreat, retrograde, retrogress, rise, rot, rotate, run, settle, settle down, shelve, shift, sidle, sink, slant, slope, soar, spin, stir, stoop, stream, subside, succeed, swag, sway, swoop, swoop down on, swoop down upon, talk down, tend, tend to go, tilt, tip, touch down, travel, trend downward, uprise, upwind, vouchsafe, wane, whirl, worsen
ROGET THESAURUS
Descend
Decrease
VB
decrease, diminish, lessen, abridge, shrink, drop off, fall off, tail off, fall away, waste, wear, wane, ebb, decline, descend, subside, melt away, die away, retire into the shade, hide its diminished head, fall to a low ebb, run low, languish, decay, crumble, bate, abate, dequantitate, discount, depreciate, extenuate, lower, weaken, attenuate, fritter away, mitigate, dwarf, throw into the shade, reduce, shorten, subtract.
Descent
VB
descend, go down, drop down, come down, fall, gravitate, drop, slip, slide, rappel, settle, plunge, plummet, crash, decline, set, sink, droop, come down a peg, slump, dismount, alight, light, get down, swoop, stoop, fall prostrate, precipitate oneself, let fall, tumble, trip, stumble, titubate, lurch, pitch, swag, topple, topple over, tumble over, topple down, tumble down, tilt, sprawl, plump down, come down a cropper.