Noun

• S: (n) expense, disbursal, disbursement (amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures))
• S: (n) expense (a detriment or sacrifice) "at the expense of"
• direct hypernym / inherited hypernym / sister term
• S: (n) expense (money spent to perform work and usually reimbursed by an employer) "he kept a careful record of his expenses at the meeting"

Verb

• S: (v) expense, write off, write down (reduce the estimated value of something) "For tax purposes you can write off the laser printer"