The word rubberstamps 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: 25
Highest Scoring Words With Friends™ Play In The Letters rubberstamps
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Seven Letter Word Alert: (57 words)
abusers, armrest, arrests, assumer, barbers, barters, basters, besmuts, breasts, brumate, bumpers, bursars, bursate, busters, erratum, estrums, masseur, masters, maturer, matures, musters, parsers, pasters, pasture, perturb, praters, prearms, pursers, rabbets, rapture, raspers, rasters, reburst, repasts, restamp, restrap, restump, retraps, rubbers, septums, smarter, sparers, sparest, sparser, spurter, stabber, stamper, starers, streams, stumper, stupers, tampers, tempura, tramper, upbeats, uprates, uprears