The word lobsterman 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™ Plays In The Letters lobsterman
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Seven Letter Word Alert: (65 words)
almoner, amblers, anomers, antlers, armlets, artsmen, atoners, banters, baronet, batsmen, bemoans, benmost, bestman, blamers, blaster, bloater, boaster, boaters, boatmen, bolster, bolters, boranes, borates, bromate, enamors, entombs, laments, leantos, loaners, lobster, maestro, maltose, mantels, mantles, marbles, martens, matrons, mentors, meronts, moaners, mobster, monster, morales, mortals, noblest, normals, notable, oarsmen, orleans, rambles, reblast, reboast, reloans, rentals, reslant, saltern, senator, smarten, sorbate, stabler, sternal, stromal, tonearm, tramels, treason