offstage vs private

offstage and private both are nouns.

Word	Noun	Adjective	Verb	Adverb
offstage	Yes	Yes	No	Yes
private	Yes	Yes	No	No

offstage (noun)	private (noun)
a stage area out of sight of the audience	an enlisted man of the lowest rank in the Army or Marines

offstage (adjective)	private (adjective)
situated or taking place in the area of a stage not visible to the audience	confined to particular persons or groups or providing privacy
concealed from public view or attention	not expressed
	concerning one person exclusively
	concerning things deeply private and personal

offstage (adverb)	private (adverb)
behind the scenes; not on stage
not in public