The word dichromate 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: 19
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (29 words)
carotid, cathode, chaired, chariot, charmed, charted, chimera, chromed, coadmit, comrade, cordate, decaohm, deciohm, demotic, ditcher, domatic, dormice, erotica, ethmoid, haricot, marched, matched, matcher, octamer, readmit, rematch, roached, thermic, torched