camping site vs campsite

camping site and campsite both are nouns.

Word	Noun	Adjective	Verb	Adverb
camping site	Yes	No	No	No
campsite	Yes	No	No	No

As nouns, camping site and campsite are synonyms defined as:

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

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

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