R.V. vs self-propelled vehicle

R.V. and self-propelled vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
R.V.	Yes	No	No	No
self-propelled vehicle	Yes	No	No	No

As nouns, self-propelled vehicle is a hypernym of R.V.; that is, self-propelled vehicle is a word with a broader meaning than R.V.:

R.V.: a motorized wheeled vehicle used for camping or other recreational activities
self-propelled vehicle: a wheeled vehicle that carries in itself a means of propulsion

R.V. (noun)	self-propelled vehicle (noun)
a motorized wheeled vehicle used for camping or other recreational activities	a wheeled vehicle that carries in itself a means of propulsion