Unribbed is valid Scrabble Word

Is unribbed a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is unribbed valid Words with Friends?
Words with Friends NO

Definitions for UNRIBBED in dictionary:

Similar words containing RIBB without suffix ed and without prefix un

ribby12 ribbed11 ribber10 ribbie10 ribbit10 ribbon10 cribbed14 cribber13 cribble13 dribbed13 dribber12 dribble12 dribbly15 fribble14 gribble12 pribble13 ribband12 ribbers11 ribbier11 ribbies11 ribbing12 ribbits11 ribbons11 ribbony14 tribble11 cribbage15 cribbers14 cribbing15 cribbled15 cribbles14 dribbers13 dribbing14 dribbled14 dribbler13 dribbles13 dribblet13 fribbled16 fribbler15 fribbles15 gribbles13 pribbles14 ribbands13 ribbiest12 ribbings13 ribboned13 ribbonry15 scribble14 scribbly17 tribbles12 cribbages16 cribbings16 cribbling16 dribblers14 dribblets14 dribblier14 dribbling15 fribblers16 fribbling17 fribblish19 ribboning14 scribbled16 scribbler15 scribbles15 ribbonier13 beribboned17 bescribble18 dribbliest15 dribblings16 ribbonfish20 ribbonlike18 ribbonries14 ribbonwood18 scribblers16 scribblier16 scribbling17 ribboniest14 bescribbled20 bescribbles19 ribbonwoods19 scribbliest17 scribblings18 bescribbling21 ribbonfishes22 scribblement20 scribblingly22 scribblements21
Find what other words can be done using letters: "unribbed"
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