Yes, stress is playable
...and is worth 6 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Stress" Definition
noun
A mentally or emotionally disruptive or upsetting condition occurring in response to adverse external influences and capable of affecting physical health, usually characterized by increased heart rate, a rise in blood pressure, muscular tension, irritability, and depression.
A state of extreme difficulty, pressure, or strain: "He presided over the economy during the period of its greatest stress and danger” ( Robert J. Samuelson).
A stimulus or circumstance causing such a condition.
A syllable having strong relative emphasis in a metrical pattern.
Accent or a mark representing such emphasis or force.
phrasal-verb
Stress out Informal To subject to or undergo extreme stress, as from working too much.
verb-transitive
To construct so as to withstand a specified stress.
To give prominence to (a syllable or word) in pronouncing or in accordance with a metrical pattern.
To place emphasis on: stressed basic fire safety.
To subject to mechanical pressure or force.
To subject to physical or mental pressure, tension, or strain.
verb
To subject to physical or psychological stress .
To subject to phonetic stress .
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