The word irreproachably 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: 28
Highest Scoring Words With Friends™ Play In The Letters irreproachably
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Seven Letter Word Alert: (58 words)
achiral, acholia, aerobic, airable, airhole, airplay, archeal, archery, areolar, barrier, biarchy, bilayer, bipolar, brachia, brioche, broiler, caliber, calibre, caliper, calorie, capable, capably, caroler, carrier, charier, charily, cheaply, chirper, cholera, chorale, clayier, coalier, crabier, crayola, eparchy, epochal, haircap, harelip, herbary, hoarier, laborer, library, parable, parboil, payable, phobiac, placebo, poacher, polaric, preachy, preboil, prelacy, pyloric, pyrrole, railcar, recarry, repayal, replica