Nouns

(n)expense, disbursal, disbursementamounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures)
(n)expensea detriment or sacrifice“at the expense of”
(n)expensemoney spent to perform work and usually reimbursed by an employer“he kept a careful record of his expenses at the meeting”

Verbs

(v)expense, write off, write downreduce the estimated value of something“For tax purposes you can write off the laser printer”