The word fountainheads 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: 22
Highest Scoring Words With Friends™ Play In The Letters fountainheads
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Seven Letter Word Alert: (86 words)
adonise, andante, anodise, anoints, astound, atonias, aunties, defiant, dentins, destain, detains, donates, dunites, enfants, fadeins, fadeout, fainted, fanouts, fashion, fathead, faunish, faunist, fishnet, foisted, fondant, fondest, fondues, funnest, funnies, fustian, handout, handset, haunted, headons, heinous, hideous, hideout, histone, hoisted, housane, indents, infants, infauna, infused, inhouse, instead, intends, intoned, intones, inuendo, nations, nondate, nondeaf, nondiet, nonfast, nonsuit, outfind, outfish, outside, sainted, shafted, shifted, shinned, shouted, shunned, shunted, sinuate, snafued, snouted, stained, stunned, tedious, tendons, tension, thinned, thiones, toadish, undents, undines, unfaith, unhands, unhated, unnoted, unsated, unshoed, unstain