The word philanthropist 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: 26
Highest Scoring Words With Friends™ Play In The Letters philanthropist
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Seven Letter Word Alert: (53 words)
airship, alphorn, altoist, appoint, aspirin, hairpin, harlots, harpist, hatpins, hatshop, intorts, laptops, liaison, nostril, orphans, parsnip, patriot, patrols, patrons, philtra, pianist, piarist, pinitol, pintail, platipi, poplars, poplins, portals, protist, rations, rattish, rattons, ripstop, shiplap, shitpot, sirloin, spotlit, starlit, station, straint, tailors, tailpin, tarnish, tartish, throats, tinpots, tiptops, toprail, topsail, topspin, transit, triptan, tropist