Yes, stop is playable
...and is worth 7 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Stop" Definition
noun
A device or means that obstructs, blocks, or plugs up.
A mark of punctuation, especially a period.
A part in a mechanism that stops or regulates movement.
A place at which someone or something stops: a regular stop on my paper route; a bus stop.
verb-transitive
Music To close (a hole on a wind instrument) with the finger in sounding a desired pitch.
Music To press down (a string on a stringed instrument) on the fingerboard to produce a desired pitch.
To be or get in the way of (a bullet or other missile); be killed or wounded by.
To block or deflect (a blow, for example); parry or ward off.
To cause to desist or to change a course of action: stopped us from continuing the argument.
adjective
Of, relating to, or being of use at the end of an operation or activity: a stop code.
Serving to stop designed to stop .
phrasal-verb
Stop down To reduce (the aperture) of a lens.
Stop out To withdraw temporarily from college.
verb-intransitive
To cease moving, progressing, acting, or operating; come to a halt: The clock stopped in the night.
To put an end to what one is doing; cease: had to stop at an exciting place in the book.
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