Yes, prick is playable
...and is worth 15 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Prick" Definition
noun
A persistent or sharply painful feeling of sorrow or remorse.
A pointed object, such as an ice pick, goad, or thorn.
A small mark or puncture made by a pointed object.
A small, sharp, local pain, such as that made by a needle or bee sting.
The act of piercing or pricking.
phrasal-verb
Prick off Nautical To measure with dividers on a chart.
verb-transitive
To affect with a mental or emotional pang, as of sorrow or remorse: His conscience began to prick him.
To cause to stand erect or point upward: The dogs pricked their ears.
To impel as if with a spur; urge on.
To mark or delineate on a surface by means of small punctures: prick a pattern on a board.
verb-intransitive
To feel a pang or twinge from or as if from being pricked.
To pierce or puncture something or cause a pricking feeling.
verb
To pierce slightly with a sharp point.
To affect with anguish, grief, or remorse .
To ride, guide, or urge on with or as if with spurs .
To mark, distinguish, or note by means of a small mark.
To trace or outline with punctures.
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