Yes, vault is playable
...and is worth 11 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Vault" Definition
noun
A burial chamber, especially when underground.
A room or compartment, often built of steel, for the safekeeping of valuables: a bank vault.
A room or space, such as a cellar or storeroom, with arched walls and ceiling, especially when underground.
An arched overhead covering, such as the sky, that resembles the architectural structure in form.
An arched structure, usually of masonry or concrete, serving to cover a space.
verb-intransitive
To accomplish something as if by leaping suddenly or vigorously: vaulted into a position of wealth.
To jump or leap, especially with the use of the hands or a pole.
verb-transitive
To build or make in the shape of a vault; arch.
To construct or supply with an arched ceiling; cover with a vault.
To jump or leap over, especially with the aid of a support such as the hands or a pole.
verb
To form or cover with or as if with a vault .
To execute a leap using the hands or a pole.
To do or achieve something as if by a leap .
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