chock up vs cram

chock up and cram both are verbs.

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

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

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

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