Yes, fade is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Fade" Definition
noun
A gradual diminution or increase in the brightness or visibility of an image in cinema or television.
A periodic reduction in the received strength of a radio transmission.
Sports A moderate, usually controlled slice, as in golf.
A gradual changing of one picture to another in a motion-picture or television sequence.
A fading of an automobile brake.
phrasal-verb
Fade in To appear gradually.
Fade in To cause to appear or be heard gradually. Used of a cinematic or television image or of a sound.
Fade out To cause to disappear gradually. Used of a cinematic or television image or of a sound.
Fade out To disappear gradually.
verb-intransitive
Football To move back from the line of scrimmage. Used of a quarterback.
Sports To swerve from a straight course, especially in the direction of a slice.
To disappear gradually; vanish: a hope that faded. See Synonyms at disappear.
To lose brightness, loudness, or brilliance gradually; dim: The lights and music faded as we set sail from the harbor.
To lose freshness; wither: summer flowers that had faded.
verb-transitive
Games To meet the bet of (an opposing player) in dice.
Sports To hit (a golf ball, for instance) with a moderate, usually controlled slice.
To cause to lose brightness, freshness, or strength: Exposure to sunlight has faded the carpet.
verb
To lose freshness, strength, or vitality.
To lose freshness or brilliance of color.
To change gradually in loudness, strength, or visibility.
To lose braking power gradually.