Yes, true is playable
...and is worth 5 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"True" Definition
noun
Proper alignment or adjustment: out of true.
Truth or reality. Used with the.
The quality or state of being accurate (as in alignment or adjustment).
adjective
Accurately placed, delivered, or thrown.
Accurately shaped or fitted: a true wheel.
Computer Science Indicating one of two possible values taken by a variable in Boolean logic or a binary device.
Conforming to the definitive criteria of a natural group; typical: The horseshoe crab is not a true crab.
Consistent with fact or reality; not false or erroneous. See Synonyms at real1. See Usage Note at fact.
adverb
In accord with reality, fact, or truthfulness.
So as to conform to a type, standard, or pattern.
Unswervingly; exactly: The archer aimed true.
In accordance with fact or reality.
verb-transitive
To position (something) so as to make it balanced, level, or square: trued up the long planks.
verb
To make level, square, balanced, or concentric bring or restore to a desired mechanical accuracy or form.
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