Yes, rally is playable
...and is worth 9 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Rally" Definition
noun
A gathering, especially one intended to inspire enthusiasm for a cause: a political rally.
A notable rise in stock market prices and trading volume after a decline.
A reassembling, as of dispersed troops.
A sharp improvement in health, vigor, or spirits.
An abrupt recovery from a setback or disadvantage.
verb-intransitive
Sports To exchange several strokes before a point is won, as in tennis.
To come together for a common purpose.
To engage in good-humored teasing or jesting.
To join in an effort for a common cause: "In the terror and confusion of change, society rallied round the kings” ( Garrett Mattingly).
To recover abruptly from a setback or disadvantage: The stock market declined, then rallied. The home team rallied in the ninth inning to win the game.
verb-transitive
To call together for a common purpose; assemble: rally troops at a parade ground.
To reassemble and restore to order: rally scattered forces.
To rouse or revive from inactivity or decline: paused to refresh themselves and rally their strength.
To tease good-humoredly; banter.
verb
To muster for a common purpose.
To rouse from depression or weakness.
To come together again to renew an effort.
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