activity any specific behavior; "they avoided all recreational activity"
disguise,
camouflage the act of concealing the identity of something by modifying its appearance; "he is a master of disguise"
mask activity that tries to conceal something; "no mask could conceal his ignorance"; "they moved in under a mask of friendship"
masking,
screening,
covering,
cover the blocking of one sensation resulting from the presence of another sensation; "he studied auditory masking by pure tones"
cover fire that makes it difficult for the enemy to fire on your own individuals or formations; "artillery provided covering fire for the withdrawal"
cover-up concealment that attempts to prevent something scandalous from becoming public
smoke screen,
smokescreen an action intended to conceal or confuse or obscure; "requesting new powers of surveillance is just a smokescreen to hide their failures"
concealment -
a covering that serves to conceal or shelter something; "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"
