concealment

(noun) the condition of being concealed or hidden. Synonyms: privacy, privateness, secrecy.

(noun) a covering that serves to conceal or shelter something. Synonyms: screen, cover, covert. Examples: "A screen of trees afforded privacy." "Under cover of darkness." "The brush provided a covert for game." "The simplest concealment is to match perfectly the color of the background."

(noun) the activity of keeping something secret. Synonyms: concealing, hiding.