Yes, scale 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)
"Scale" Definition
noun
A calibrated line, as on a map or an architectural plan, indicating such a proportion.
A flaky oxide film formed on a metal, as on iron, that has been heated to high temperatures.
A hard mineral coating that forms on the inside surface of boilers, kettles, and other containers in which water is repeatedly heated.
A minimum wage fixed by contract: musicians playing a benefit concert for scale.
verb-transitive
Australian To cheat; swindle.
Australian To ride on (a tram or train, for example) without paying the fare.
Dentistry To remove (tartar) from tooth surfaces with a pointed instrument.
To alter according to a standard or by degrees; adjust in calculated amounts: scaled down their demands; scaled back the scheduled pay increase.
To clear or strip of scale or scales: Scale and clean the fish.
verb-intransitive
To come off in scales or layers; flake.
To have a given weight, as determined by a scale: cargo that scales 14 metric tons.
To rise in steps or stages.
verb
To climb up or reach by means of a ladder.
To arrange in a graduated series.
To climb by or as if by a ladder.
To rise in a graduated series.
To measure or estimate the sound content of (as logs).
We love the game of Scrabble®, which is why we created Free Scrabble Dictionary - a simple lookup tool to check if the word you want to play is valid in the game of Scrabble®. At the top of every page, you can enter your word and click "Search Dictionary." We'll let you know whether your word is playable and provide a few definitions as well.