Is crease a word in the Scrabble Dictionary

Yes, crease 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)

"Crease" Definition

noun

A line made by pressing, folding, or wrinkling.
Sports A rectangular area marked off in front of the goal in hockey and lacrosse.
Sports One of the lines in cricket marking off the positions of the bowler and batter or the space between two of these lines.
A line, mark, or ridge made by or as if by folding a pliable substance.
A specially marked area in various sports.

verb-intransitive

To become wrinkled.

verb-transitive

To graze or wound superficially with a bullet.
To make a pressed, folded, or wrinkled line in.

verb

To make a crease in or on.
To wound slightly especially by grazing.
To become.