privately Synonyms

in private in camera out of the public eye on the qt on the q.t. off the record in confidence surreptitiously secretively discreetly conspiratorially clandestinely between ourselves behind closed doors in secret on the quiet on the side on the sly out of public view between us in one's heart by stealth voyeuristically unofficially unobtrusively unobserved under the counter under cover subjectively undercover sneakingly sneakily sub-rosa backstage deep down intimately internally interiorly instinctively inside inofficiously informally individually furtively familiarly esoterically covertly confidentially characteristically intuitively