camper vs recreational vehicle

camper and recreational vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
camper	Yes	No	No	No
recreational vehicle	Yes	No	No	No

As nouns, recreational vehicle is a hypernym of camper; that is, recreational vehicle is a word with a broader meaning than camper:

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

Other hypernyms of camper include R.V., RV.

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