chock up vs wad

chock up is not a noun while wad is a noun.

Word	Noun	Adjective	Verb	Adverb
chock up	No	No	Yes	No
wad	Yes	No	Yes	No

As verbs, chock up and wad are synonyms defined as:

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

chock up (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

chock up (verb)	wad (verb)
crowd or pack to capacity	crowd or pack to capacity
	compress into a wad