The word certificating 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
Seven Letter Word Alert: (48 words)
accinge, actinic, cantref, carting, cattier, catting, centric, certain, citrate, citrine, cittern, crating, engraft, fainter, fairing, fancier, fattier, fearing, fireant, fitting, frantic, frigate, granite, icteric, igniter, inciter, inertia, infarct, ingraft, ingrate, nattier, nictate, niftier, nitrate, nitrite, nittier, rafting, ratting, reicing, rifting, tangier, tantric, tearing, tetanic, tiering, tintier, titanic, tracing