verb
vanish, fade, come to naught, cease, die, drop out of sight, become imperceptible, withdraw, dissolve, evaporate, pass out of sight, recede from view, cease to be seen, undergo eclipse, pass, go, leave no trace, be swallowed up, fade away, pass away, pass out, retire, retire from sight, retreat, vanish from sight, be lost to view, sink, exit, go off the stage, pass on, leave, vacate, abscond, depart, decamp, perish, die out, become extinct, be eradicated, be consumed, fade out, die away, go away, escape, be gone, dissipate, evanesce, be no more, cease to exist, come to an end, end gradually, wane, ebb, disperse, fall away, melt away, vanish into thin air, dematerialize, vamoose*, do a disappearing act*, take French leave*, pass out of the picture*, go poof*; see also die 2, escape, evaporate 1.
Antonyms appear*, emerge, materialize.
disappear implies either a sudden or gradual passing from sight or existence customs that have long since disappeared; vanish implies a sudden, complete, often mysterious passing from sight or existence the stain had vanished overnight; fade suggests a gradual, complete or partial disappearance, as by losing color or brilliance the design on this fabric won't fade, his reputation has faded