campground vs camping area

campground and camping area both are nouns.

Word	Noun	Adjective	Verb	Adverb
campground	Yes	No	No	No
camping area	Yes	No	No	No

As nouns, campground and camping area are synonyms defined as:

campground and camping area: a site where people on holiday can pitch a tent

Other synonyms of campground include bivouac, camping ground, camping site, campsite, encampment.

campground (noun)	camping area (noun)
a site where people on holiday can pitch a tent	a site where people on holiday can pitch a tent