The word bullheadedness 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: 25
Highest Scoring Words With Friends™ Play In The Letters bullheadedness
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Seven Letter Word Alert: (73 words)
abluded, abludes, alluded, alludes, badness, baleens, banshee, bedhead, bedless, beheads, belauds, blended, blessed, blushed, blushes, budless, bundled, bundles, bushels, dandles, deadens, deashed, deashes, debased, debases, debused, debuses, deleads, deludes, denudes, desands, deseeds, deshade, duelled, enabled, enables, enbused, enbuses, endless, enseals, handled, handles, hasbeen, healded, huddles, hueless, husband, labeled, leashed, leashes, nebulae, nebulas, needled, needles, saddens, saddles, seabeds, seeable, seedbed, sensual, shelled, slashed, slushed, subhead, suddens, sunbeds, sundaes, unbaled, unbales, unbless, unleash, unseals, useable