great deal vs wad

great deal and wad both are nouns.

Word	Noun	Adjective	Verb	Adverb
great deal	Yes	No	No	No
wad	Yes	No	Yes	No

As nouns, great deal and wad are synonyms defined as:

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

great deal (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

great deal (verb)	wad (verb)
	crowd or pack to capacity
	compress into a wad