The word prognostics 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 prognostics
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Seven Letter Word Alert: (44 words)
citrons, consist, consort, cooping, copings, copsing, cosigns, costing, gnostic, isogons, oncosis, options, pistons, poisons, porosis, porotic, portico, porting, portion, posting, potions, prisons, prootic, protons, rooting, scoping, scoring, scorpio, scripts, signors, sooting, sorting, spigots, sponsor, sporing, sporont, springs, sprints, storing, strings, tocsins, torsion, tossing, tropics