The word pasteboard 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (30 words)
abaters, abators, aborted, abrades, abrased, abreast, adapter, adaptor, adopter, bedpost, bedrops, bedropt, boasted, boaster, boaters, borates, debtors, departs, deports, parades, petards, probate, readapt, readopt, reboast, roasted, seaport, sorbate, sported, strobed