Countless and Tidy sum

Countless adjective - Too many to be counted.

Tidy sum and countless are semantically related. in innumerable topic. In some cases you can use "Tidy sum" instead an adjective "Countless".

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

Countless and tidy sum are semantically related. Sometimes you can use "Countless" instead an adjective phrase "Tidy sum".