ram vs cram

ram is a noun but cram is not a noun.

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

As verbs, ram and cram are synonyms defined as:

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

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

ram (verb)	cram (verb)
force into or from an action or state, either physically or metaphorically	prepare (students) hastily for an impending exam
undergo damage or destruction on impact	study intensively, as before an exam
strike or drive against with a heavy impact	crowd or pack to capacity
crowd or pack to capacity	put something somewhere so that the space is completely filled