The word legionaries 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: 15
Highest Scoring Words With Friends™ Plays In The Letters legionaries
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Seven Letter Word Alert: (71 words)
aerogel, agonies, agonise, aileron, airings, airline, aisling, aligner, anglers, areoles, arising, elision, elogies, eloigns, enlarge, enolase, enrages, erasing, gainers, gaolers, general, genials, girlies, girnels, gleaner, glories, goalies, greisen, ignores, ioniser, ironage, ironies, lairing, leaners, learing, leasing, leering, legions, liaison, lineage, lingers, lingoes, lionise, loaners, nailers, negroes, noisier, oranges, origins, orleans, railing, raising, realign, realise, reeling, regains, regions, relines, reloans, renails, roiling, sailing, seagoer, sealing, sealion, searing, signora, sirloin, slinger, soaring, soiling