Big money and Tidy sum

Big money noun - A large sum of money (especially as pay or profit).

Tidy sum and big money are semantically related. In some cases you can use "Tidy sum" instead a noun phrase "Big money".

Tidy sum noun - (often followed by `of') a large number or amount or extent.

Big money and tidy sum are semantically related. Sometimes you can use "Big money" instead a noun phrase "Tidy sum".