camping ground vs camping area

camping ground and camping area both are nouns.

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

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

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

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

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