Synonyms for Lose:

n.

commercial, commercialism, speculative, pay, profitability, arbitrage, yield, boom, speculation. flee, bolt, gain, make off with, break for, waste, get away, break away, make a break (for something), break out, profit. give away, expend, go down, submit, go out, squander, roll over, concede, spend, bomb out of, appease, surrender. burn, strain, injure, bruise, break, harm, used, cut, wound, disable. demise, seek, shake, fatality, dying, evade, elude, shake off, mortality, bereavement, death toll, morbidity, throw off, death, death throes, death rate. confound, confuse, divert, discombobulate, disorient, bamboozle, preoccupy, bewilder, distract. slip away, do without. plump out, slim down, put on, stay off, sweat off, fatten up, fat camp, fill out, trim down. tick, keep time, strike, strike the hour, tick away. be onto a winner, stand a chance/hope (of doing something), someone should/will go far, be in/out of the running, be halfway there, someone's getting there, the cards are stacked in someone's favor, have a fighting chance, you can't go wrong, have something in your pocket. lose (noun)
mislay, misplace, turn a loss, miss, recede, fall back, drop off, fall behind, suffer.

v.

bomb (verb)
flop.
change (verb)
suffer.
clear (verb)
erase.
contract (verb)
shrink, recede, omit, decrease.
displace (verb)
mislay.
fail (verb)
collapse, flounder, flop, bust, blunder, falter, flunk, fail, stumble, fall.
forget (verb)
elapse, neglect, blank, omit, forget, erase, overlook, obliterate.
lose (verb)
shrink, exhaust, forfeit, fail, shake off, divest, decrease, decrement, waste, shake, miss, dispossess, deplete, fall, forget, suffer, squander, slip away, succumb, yield, drop, erode, elude, expend, throw off, dissolve, misplace, evade, surrender, debit, dissipate.

Other synonyms:

fatten up, plump out, fat camp, bomb out of, appease, slip away. roll over, trim down, fill out, do without, sweat off, slim down, tick away, waste. go out, stay off, evade, elude. give away, submit, concede, surrender, go down. tick. shake. strike. contract
recede.
drop-off
drop off.
fall behind
fall behind.
waste
waste.

Usage examples for lose

  1. I will not lose her! – If Any Man Sin by H. A. Cody
  2. It will be hard to lose it, but I guess I can stand it." – Tom Swift and his Undersea Search or, The Treasure on the Floor of the Atlantic by Victor Appleton
  3. We may lose in an hour all we have made in a year. – Is The Bible Worth Reading And Other Essays by Lemuel K. Washburn