R.V. vs camper

R.V. and camper both are nouns.

Word	Noun	Adjective	Verb	Adverb
R.V.	Yes	No	No	No
camper	Yes	No	No	No

As nouns, camper is a hyponym of R.V.; that is, camper is a word with a more specific, narrower meaning than R.V.:

R.V.: a motorized wheeled vehicle used for camping or other recreational activities
camper: a recreational vehicle equipped for camping out while traveling

Other hyponyms of R.V. include camping bus, motor home, beach buggy, dune buggy.

R.V. (noun)	camper (noun)
a motorized wheeled vehicle used for camping or other recreational activities	a recreational vehicle equipped for camping out while traveling
	someone living temporarily in a tent or lodge for recreation