a pretense, a deception or an empty farce, often with an element of absurdity or mockery, usually intended to create an appearance of respectability or pleasantness;
e.g. Their pleasantness was a charade since they actually hated each other.
(noun)
a game in which players, usually divided into teams, have to guess words or phrases that are wordlessly acted out by another player (usually used as "charades");