Yes, think is playable
...and is worth 12 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Think" Definition
noun
The act or an instance of deliberate or extended thinking; a meditation.
idiom
Come to think of it Informal When one considers the matter; on reflection: Come to think of it, that road back there was the one we were supposed to take.
Think big To plan ambitiously or on a grand scale.
Think little of To regard as inferior; have a poor opinion of.
Think nothing of To give little consideration to; regard as routine or usual: thought nothing of a 50-mile trip every day.
adjective
Informal Requiring much thought to create or assimilate: a think book.
Relating to, requiring, or stimulating .
verb-transitive
To believe; suppose: always thought he was right.
To bring into a given condition by mental preoccupation: He thought himself into a panic over the impending examination.
To decide by reasoning, reflection, or pondering: thinking what to do.
To devise or evolve; invent: thought up a plan to get rich quick.
To have or formulate in the mind.
verb-intransitive
To bring a thought to mind by imagination or invention: No one before had thought of bifocal glasses.
To dispose the mind in a given way: Do you think so?.
To exercise the power of reason, as by conceiving ideas, drawing inferences, and using judgment.
To have care or consideration: Think first of the ones you love.
To recall a thought or an image to mind: She thought of her childhood when she saw the movie.
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