campground vs encampment

campground and encampment both are nouns.

Word	Noun	Adjective	Verb	Adverb
campground	Yes	No	No	No
encampment	Yes	No	No	No

As nouns, campground and encampment are synonyms defined as:

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

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

campground (noun)	encampment (noun)
a site where people on holiday can pitch a tent	the act of encamping and living in tents in a camp
	temporary living quarters specially built by the army for soldiers
	a site where people on holiday can pitch a tent