The word fatherless 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: 16
Highest Scoring Words With Friends™ Play In The Letters fatherless
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Seven Letter Word Alert: (44 words)
artless, earless, elaters, falsest, falters, fathers, feather, festers, flasher, flashes, fleshes, hafters, halters, hatless, healers, hearses, heaters, hefters, herself, lashers, lathers, leasers, leashes, leather, rashest, realest, reflash, reflate, reheats, relates, resales, reseals, reseats, sealers, seaters, shelter, slasher, slaters, slather, stealer, tealess, teasels, teasers, trashes