Yes, stagger is playable
...and is worth 11 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Stagger" Definition
noun
A staggered pattern, arrangement, or order.
A tottering, swaying, or reeling motion.
Any of various diseases of the nervous system in animals, especially horses, cattle, or other domestic animals, characterized by a lack of coordination in moving, a staggering gait, and frequent falling. Also called blind staggers.
An abnormal condition of domestic animals associated with damage to the central nervous system and marked by incoordination and a reeling unsteady gait.
A reeling or unsteady gait or stance.
verb-transitive
Sports To arrange (the start of a race) with the starting point in the outside lanes progressively closer to the finish line so as to neutralize the advantage of competing in the shorter inside lanes.
To arrange (the wings of a biplane) so that the leading edge of one wing is either ahead of or behind the leading edge of the other wing.
To cause to totter, sway, or reel: The blow staggered him.
To cause to waver or lose confidence.
To overwhelm with emotion or astonishment.
verb-intransitive
To begin to lose confidence or strength of purpose; waver.
To move or stand unsteadily, as if under a great weight; totter.
verb
To cause to reel or totter.
To arrange in any of various zigzags, alternations, or overlappings of position or time .
To cause to doubt or hesitate .
To waver in purpose or action .
adjective
Marked by an alternating or overlapping pattern.
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