Yes, joint 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)
"Joint" Definition
noun
A large cut of meat for roasting.
A place or part at which two or more things are joined.
A way in which two or more things are joined: a mortise-and-tenon joint; flexible joints.
Anatomy A point in the exoskeleton of an invertebrate at which movable parts join, as along the leg of an arthropod.
Anatomy A point of articulation between two or more bones, especially such a connection that allows motion.
verb
To provide with a joint .
To prepare (as a board) for by planing the edge.
To form joints as a stage in growth .
To separate the of (as meat).
adjective
Formed or characterized by cooperation or united action: joint military maneuvers.
Involving both houses of a legislature: a joint session of Congress.
Law Regarded as one legal body; united in identity of interest or liability.
Mathematics Involving two or more variables.
Shared by or common to two or more: our joint presence; a joint income-tax return.
idiom
Out of joint Dislocated, as a bone.
Out of joint In bad spirits or humor; out of sorts.
Out of joint Not harmonious; inconsistent.
Out of joint Out of order; inauspicious or unsatisfactory.
verb-transitive
To combine or attach with a joint or joints: securely jointed the sides of the drawer.
To provide or construct with joints: joint a boom on a crane.
To separate (meat) at the joints.
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