allusion / illusion
An indirect reference versus a false appearance.
An allusion is an indirect reference, usually to a text, event, or person: an allusion to Job. An illusion is a misleading appearance or a false belief: an optical illusion, the illusion of control. You make an allusion to something. You have an illusion of something, or you are under an illusion.
Examples
UseThe title is an allusion to King Lear.
UseThe hallway gives the illusion of more space.
AvoidThe title is an illusion to King Lear.