The word electromagnet 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: 23
Highest Scoring Words With Friends™ Play In The Letters electromagnet
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Seven Letter Word Alert: (70 words)
acetone, aerogel, almoner, catelog, catogen, central, clangor, clatter, cleaner, clement, clotter, coalmen, cognate, congeal, corneal, cornett, cottage, cremate, elector, elegant, element, enactor, enlarge, enolate, enteral, entreat, eternal, galette, garment, garotte, gatemen, general, gentler, germane, glancer, gleaner, gleeter, gloater, grantee, greaten, lactone, lectern, magneto, mangler, megaton, melange, mongrel, montage, mottler, neglect, octamer, reagent, reclang, reclean, reclone, reelect, reenact, retotal, romance, tangelo, teenage, telecom, telogen, telomer, tentage, ternate, tonearm, torment, treacle, treelet