Synonyms for Lose:

n.

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

v.

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

Other synonyms:

appease, fatten up, plump out, slip away, bomb out of, fat camp. fill out, roll over, slim down, sweat off, trim down, waste, do without, tick away. elude, evade, stay off, go out. concede, give away, go down, submit, surrender. tick. shake. strike. contract
recede.
drop-off
drop off.
fall behind
fall behind.
waste
waste.
Other relevant words:
abuse, appease, arbitrage, bamboozle, bereavement, bewilder, bolt, boom, break, bruise, burn, commercial, commercialism, concede, confound, confuse, cut, death, demise, disable, discombobulate, disorient, distract, divert, dying, elude, evade, expend, fall back, fall behind, fatality, flee, fritter away, go down, harm, injure, mislay, miss, misuse, morbidity, mortality, overwork, pay, preoccupy, profit, profitability, recede, seek, shake, shake off, slip away, speculation, speculative, spend, squander, strain, strike, submit, succumb, suffer, surrender, tick, triumph, turn a loss, used, waste, win, wound, yield.

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