Nouns

(n)private, buck private, common soldieran enlisted man of the lowest rank in the Army or Marines“our prisoner was just a private and knew nothing of value”

Adjectives

(a)privateconfined to particular persons or groups or providing privacy“a private place”, “private discussions”, “private lessons”, “a private club”, “a private secretary”, “private property”, “the former President is now a private citizen”, “public figures struggle to maintain a private life”
(s)private, intimateconcerning things deeply private and personal“intimate correspondence”, “private family matters”
(s)individual, privateconcerning one person exclusively“we all have individual cars”, “each room has a private bath”
(s)secret, privatenot expressed“secret (or private) thoughts”