The word tenderfoots 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 tenderfoots
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Seven Letter Word Alert: (32 words)
defrost, deftest, denotes, detents, detorts, dotters, endorse, estrone, fenders, festoon, fetters, fondest, footers, forseen, fretted, fronted, frosted, netters, oftener, rodents, roosted, rosette, snooted, snorted, snotted, snotter, stented, sterned, tenders, tenters, tooters, tornote