The word laboursaving 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: 24
Highest Scoring Words With Friends™ Play In The Letters laboursaving
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Seven Letter Word Alert: (54 words)
abasing, aboulia, abulias, abusing, agnosia, airbags, airguns, albinos, analogs, angular, arousal, bargain, basilar, blaring, bolivar, borings, bousing, braving, brogans, burials, burling, busgirl, goblins, granola, guarani, iguanas, insular, labours, languor, langurs, lousing, lunaria, ovarian, ravings, rousing, rulings, saguaro, salving, sangria, saurian, saviour, signora, slaving, soaring, solving, souring, subgoal, subrail, urinals, vaginal, vaginas, valuing, variola, various