motor home vs camping bus

motor home and camping bus both are nouns.

Word	Noun	Adjective	Verb	Adverb
motor home	Yes	No	No	No
camping bus	Yes	No	No	No

As nouns, motor home and camping bus are synonyms defined as:

motor home and camping bus: a recreational vehicle equipped for camping out while traveling

Other synonyms of motor home include camper.

motor home (noun)	camping bus (noun)
a recreational vehicle equipped for camping out while traveling	a recreational vehicle equipped for camping out while traveling