The word octogenarian 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 octogenarian
:
Seven Letter Word Alert: (54 words)
aconite, agatine, ancient, antigen, atoning, cannier, canting, carinae, carnage, cartage, carting, cartoon, catenin, catogen, certain, coating, cognate, coinage, connote, contain, coreign, corning, coronet, craning, crating, earning, enactor, entrain, erotica, gentian, granite, ingrate, intoner, ionogen, ironage, nearing, nonriot, octagon, oncogen, orating, oration, oregano, organic, otarine, ranting, regnant, renting, roaning, rooting, tanager, tangier, tearing, tonnage, tracing