The word arcminutes 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: 18
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (85 words)
acumens, amnesic, antsier, arcsine, arenium, arsenic, artsmen, atriums, aunties, caesium, canters, carmine, carnies, cauters, centaur, ceriums, certain, cinemas, cistern, cranium, cretins, cristae, curates, curtain, encrust, icemans, incrust, inmates, manures, marines, martens, martins, matures, metrics, minaret, mincers, minters, minuets, minuter, minutes, mistune, misturn, munites, muriate, mustier, nastier, natures, nectars, nematic, numeric, nutcase, nutsier, raciest, raiment, recants, rectums, remains, remints, restain, retains, retinas, runtime, sanctum, saucier, saunter, scanter, seminar, sinuate, sirname, smarten, smartie, stainer, sternum, surname, trances, tsunami, tumeric, uncarts, uncrate, uncrime, uniters, unmates, uraemic, uricase, urinate