The word laudableness 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: 20
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (33 words)
abludes, alludes, badness, baleens, ballads, bedless, belauds, blessed, budless, bundles, debases, debuses, enabled, enables, enbused, enbuses, endless, enseals, labeled, nabales, nebulae, nebulas, salable, sandals, seabeds, sensual, sunbeds, sundaes, unbaled, unbales, unbless, unseals, useable