make-believe

/M EY1 K B IH0 L IY0 V/
noun
  1. 1

    The quality or act of pretending; acting as if something is true when in fact one knows it is not.

  2. 2

    The action of pretending or imagining that things are better than they really are.

Source: https://en.wiktionary.org/wiki/make-believe