The word southwestward 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: 23
Highest Scoring Words With Friends™ Play In The Letters southwestward
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Seven Letter Word Alert: (95 words)
aroused, arouses, assured, astuter, authors, dashers, dearths, dehorts, detorts, detours, dotters, dousers, dowress, dowsers, dowsets, drowses, dusters, earshot, estrous, hardest, hatreds, hatters, oestrus, ousters, outdare, outdate, outdraw, outdrew, outrate, outread, outsets, outward, outwash, outwear, rashest, readout, reshows, rethaws, retoast, roasted, rotated, rotates, sawdust, sawwort, shaders, shadows, shatter, shorted, shotted, shouted, shouter, showers, shrouds, shutter, sourest, started, stashed, staters, statued, statues, stature, steward, stouter, stratus, strawed, strowed, sudates, swashed, swasher, swathed, swathes, swatted, swatter, tasters, threads, threats, throats, thrusts, thwarts, toasted, toaster, toruses, touters, towards, trashed, trashes, trussed, trusted, tutored, urostea, uswards, washers, washout, wasters, wreaths