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expense
[COUNTABLE AND UNCOUNTABLE]
When buying a plane ticket, you should also take into consideration some additional expenses, such as luggage fees.
Buying a flat is an enormous expense for young people.
My new car was a big expense but it was worth it.
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outlay
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spend
informal
[COUNTABLE]
Buying a new car is a big spend.
They have much more spends after their child's birth.
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discharge