The word holometabolism 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: 27
Highest Scoring Words With Friends™ Play In The Letters holometabolism
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Seven Letter Word Alert: (46 words)
abolish, albites, alltime, astilbe, atheism, atomise, atomism, ballets, ballots, betoils, billets, bimetal, blemish, boomlet, embalms, halites, hamlets, holiest, hollies, homiest, hostile, isolate, libates, loathes, lobelia, losable, mallets, maltose, millets, mismate, mistell, mobiles, moolahs, oolemma, oolites, ooliths, osteoma, seaboot, shallot, shamble, stoolie, tabooli, tallies, tallish, thimble, timbale