Heaps and Tidy sum

Heaps noun - A large number or amount.

Tidy sum is a synonym for heaps. In some cases you can use "Tidy sum" instead a noun "Heaps".

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

Heaps is a synonym for tidy sum. Sometimes you can replace term "Heaps" with "Tidy sum", this terms are similar.