The word surfboarders is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 20
Highest Scoring Words With Friends™ Plays In The Letters surfboarders
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Seven Letter Word Alert: (29 words)
abusers, adorers, adsorbs, arbored, arbours, ardours, aroused, arouser, arouses, assured, boarder, borders, brassed, broader, bursars, daubers, deburrs, dousers, fedoras, ferrous, forbade, forbear, reboard, resorbs, roarers, rosebud, soarers, sofabed, surfers