What is the noun for spend? spend. spend. Amount spent (during a period), expenditure. (pluralize) expenditures; money or pocket money. Synonyms: cost, price, charge, fee, rate, worth, amount, bill, figure, tariff, value, expenditure, expense, fare, quotation, tab, toll, ante, assessment, damage, dues, estimate, expenses, freight, levy, outlay, ...

According to the ODO "spend" as a noun is an informal alternative to "spending": the average spend at the cafe is £10 a head. the average spend per child is continuing to rise year-on-year. According to the Collins Dicionary: NGRAM shows that spend as a noun has been used since the first decades of the 20th century.