wad vs cram

wad is a noun but cram is not a noun.

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

As verbs, wad and cram are synonyms defined as:

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

wad (noun)	cram (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

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