Yes, vest 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)
"Vest" Definition
noun
A sleeveless garment, often having buttons down the front, worn usually over a shirt or blouse and sometimes as part of a three-piece suit.
A waist-length, sleeveless garment worn for protection: a warm down vest; a bulletproof vest.
Archaic Clothing; raiment.
Chiefly British An undershirt.
Obsolete An ecclesiastical vestment.
verb-intransitive
To become legally vested.
To dress oneself, especially in ecclesiastical vestments.
verb-transitive
To clothe or robe, as in ecclesiastical vestments.
To invest or endow (a person or group) with something, such as power or rights. Used with with: vested the council with broad powers; vests its employees with full pension rights after five years of service.
To place (authority, property, or rights, for example) in the control of a person or group, especially to give someone an immediate right to present or future possession or enjoyment of (an estate, for example). Used with in: vested his estate in his daughter.
verb
To place or give into the possession or discretion of some person or authority.
To give to a person a legally fixed immediate right of present or future enjoyment of (as an estate).
To grant or endow with a particular authority, right, or property .
To clothe with or as if with a garment.
To robe in ecclesiastical .
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