cram vs wad

cram is not a noun while wad is a noun.

Word	Noun	Adjective	Verb	Adverb
cram	No	No	Yes	No
wad	Yes	No	Yes	No

As verbs, cram and wad are synonyms defined as:

Other synonyms of cram include chock up, jam, jampack, ram.

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

cram (verb)	wad (verb)
prepare (students) hastily for an impending exam	crowd or pack to capacity
study intensively, as before an exam	compress into a wad
crowd or pack to capacity
put something somewhere so that the space is completely filled