ram vs battering ram

ram and battering ram both are nouns.

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

As nouns, battering ram is a hyponym of ram; that is, battering ram is a word with a more specific, narrower meaning than ram:

Other hyponyms of ram include rammer.

ram (noun)	battering ram (noun)
uncastrated adult male sheep	a ram used to break down doors of fortified buildings
a tool for driving or forcing something by impact

ram (verb)	battering ram (verb)
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