Vanished
Part of speech: verb
Definition: To become invisible or to move out of view unnoticed.
Nonexistent
Part of speech: adjective
Definition: Not existent; not real.
Example sentence: There's not democracy in the workplace. I mean, through most of our daily lives, the idea of democracy is fairly nonexistent. And I think things work better when the people who have to work with whatever it is we're working with have a say in how it's working.