The word holometabolic 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: 26
Highest Scoring Words With Friends™ Plays In The Letters holometabolic
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Seven Letter Word Alert: (28 words)
alcohol, alethic, alltime, aloetic, amoebic, bimetal, biotech, boomlet, calomel, cholate, citable, climate, coalite, cohabit, collate, embolic, ethical, helical, hellcat, iceball, iceboat, lobelia, metical, micella, ootheca, tabooli, thimble, timbale