Yes, tread is playable
...and is worth 6 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Tread" Definition
noun
A mark made by treading, as in snow.
An instance of treading; a step.
Either of the continuous metal belts with which bulldozers, tanks, and certain other vehicles move over the ground.
The act, manner, or sound of treading.
The grooved face of a tire.
verb-transitive
To copulate with. Used of a male bird.
To execute by walking or dancing: tread a measure.
To form by walking or trampling: tread a path.
To press beneath the feet; trample.
To subdue harshly or cruelly; crush.
verb-intransitive
To copulate. Used of birds.
To press, crush, or injure something by or as if by trampling. Often used with on or upon: trod on her feelings.
To set down the foot; step.
idiom
Tread the boards To act on the stage: "We who tread the boards are not the only players of parts in this world” ( John Fowles).
Tread water To expend effort but make little or no progress to achievement of a goal or an end.
Tread water To keep the head above water while in an upright position by pumping the legs.
verb
To step or walk on or over.
To walk or proceed along .
To beat or press with the feet .
To subdue or repress as if by trampling .
We love the game of Scrabble®, which is why we created Free Scrabble Dictionary - a simple lookup tool to check if the word you want to play is valid in the game of Scrabble®. At the top of every page, you can enter your word and click "Search Dictionary." We'll let you know whether your word is playable and provide a few definitions as well.