Yes, float is playable
...and is worth 9 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Float" Definition
noun
A buoyant object, such as a cork, used to hold a net or fishing line afloat.
A decorated exhibit or scene mounted on a mobile platform and pulled or driven in a parade.
A floating ball attached to a lever to regulate the water level in a tank.
A landing platform attached to a wharf and floating on the water.
verb-transitive
Computer Science To convert (data) from fixed-point notation to floating-point notation.
Economics To allow (the exchange value of a currency) to find freely its real level in relationship to other currencies.
To cause to remain suspended without sinking or falling.
To flood (land), as for irrigation.
verb-intransitive
Economics To find a level in relationship to other currencies solely in response to the law of supply and demand: allowed the dollar to float.
To be suspended in or move through space as if supported by a liquid.
To move easily or lightly: "Miss Golightly . . . floated round in their arms light as a scarf” ( Truman Capote).
To move from place to place, especially at random.
To remain suspended within or on the surface of a fluid without sinking.
verb
To rest on the surface of or be suspended in a fluid.
To drift on or through or as if on or through a fluid.
To find a level in the international exchange market in response to the law of supply and demand and without any restrictive effect of artificial support or control.
To cause to float in or on the surface of a fluid.
To cause to float as if in a fluid.
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