The word holidaymaker 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™ Plays In The Letters holidaymaker
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Seven Letter Word Alert: (31 words)
admiral, airhead, airhole, alamode, alarmed, already, amyloid, armhole, armlike, armload, damlike, diorama, earldom, earmold, hardily, hayrake, hayride, holiday, hyaloid, hydroma, ilkaday, loamier, mayoral, midyear, moldier, myeloid, oarlike, raylike, readily, rodlike, yolkier