The word invigilated 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 invigilated
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Seven Letter Word Alert: (36 words)
aligned, anilide, anviled, dealign, dealing, deaving, delving, deviant, dialing, dieting, digital, editing, elating, eliding, evading, eviting, gelatin, genital, glinted, ignited, ilvaite, initial, intagli, invalid, invited, leading, leaving, ligated, lignite, tagline, tailing, tangled, tingled, veiling, vialing, vintage