camp out vs bivouac

camp out is not a noun while bivouac is a noun.

Word	Noun	Adjective	Verb	Adverb
camp out	No	No	Yes	No
bivouac	Yes	No	Yes	No

As verbs, camp out and bivouac are synonyms defined as:

Other synonyms of camp out include camp, encamp, tent.

camp out (noun)	bivouac (noun)
	temporary living quarters specially built by the army for soldiers
	a site where people on holiday can pitch a tent

camp out (verb)	bivouac (verb)
live in or as if in a tent	live in or as if in a tent