tidy sum vs wad

tidy sum and wad both are nouns.

Word	Noun	Adjective	Verb	Adverb
tidy sum	Yes	No	No	No
wad	Yes	No	Yes	No

As nouns, tidy sum and wad are synonyms defined as:

tidy sum and wad: (often followed by `of') a large number or amount or extent

tidy sum (noun)	wad (noun)
(often followed by `of') a large number or amount or extent	a wad of something chewable as tobacco
	(often followed by `of') a large number or amount or extent
	a small mass of soft material

tidy sum (verb)	wad (verb)
	crowd or pack to capacity
	compress into a wad