ram vs ram down

ram is a noun but ram down is not a noun.

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

As verbs, ram and ram down are synonyms defined as:

Other synonyms of ram include pound.

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

ram (verb)	ram down (verb)
force into or from an action or state, either physically or metaphorically	teach by drills and repetition
undergo damage or destruction on impact	strike or drive against with a heavy impact
strike or drive against with a heavy impact
crowd or pack to capacity