chock up vs ram

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

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

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

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

chock up (noun)	ram (noun)
	uncastrated adult male sheep
	a tool for driving or forcing something by impact

chock up (verb)	ram (verb)
crowd or pack to capacity	force into or from an action or state, either physically or metaphorically
	undergo damage or destruction on impact
	strike or drive against with a heavy impact
	crowd or pack to capacity