The word antifeminists 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: 21
Highest Scoring Words With Friends™ Play In The Letters antifeminists
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Seven Letter Word Alert: (37 words)
animist, asinine, enfants, famines, fastens, fastest, fatness, fattens, fatties, fiestas, fitness, imitate, infants, infests, inmates, inseams, instant, instate, intents, miniate, misfits, misseat, mitiest, mittens, seitans, sestina, setfast, siennas, simians, smitten, stamens, statins, statism, stimies, tannest, tenants, tiniest