THESAURUS
shell out
accord, administer, afford, allot, allow, award, bestow, bestow on, budget, communicate, confer, cost, cost out, deal, deal out, disburse, dish out, dispense, dole, dole out, donate, expend, extend, fork out, gift, gift with, give, give freely, give out, go through, grant, hand out, heap, help to, impart, incur costs, invest, issue, lavish, lay out, let have, mete, mete out, offer, open the purse, outlay, pay, pay out, pour, present, proffer, put out, rain, render, run through, schedule, serve, shower, sink money in, slip, snow, spend, splurge, squander, tender, throw money around, vouchsafe, yield
ROGET THESAURUS
shell out
Payment
VB
pay, defray, make payment, paydown, pay on the nail, pay ready money, pay at sight, pay in advance, cash, honor a bill, acknowledge, redeem, pay in kind, pay one's way, pay one's shot, pay one's footing, pay the piper, pay sauce for all, pay costs, do the needful,
shell out, fork out, cough up, fork over, come down with, come down with the dust, tickle the palm, grease the palm, expend, put down, lay down, discharge, settle, quit, acquit oneself of, foot the bill, account with, reckon with, settle with, be even with, be quits with, strike a balance, settle accounts with, balance accounts with, square accounts with, quit scores, wipe off old scores, clear off old scores, satisfy, pay in full, satisfy all demands, pay in full of all demands, clear, liquidate, pay up, pay old debts, disgorge, make repayment, repay, refund, reimburse, retribute, make compensation, pay by credit card, put it on the plastic.
Expenditure
VB
expend, spend, run through, get through, pay, disburse, ante, ante up, pony up, open the purse strings, loose the purse strings, untie the purse strings, lay out,
shell out, fork out, fork over, bleed, make up a sum, invest, sink money, run up debts, run up bills (debt), fee, pay one's way, subscribe, subsidize.