The word blastoderm 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: 18
Highest Scoring Words With Friends™ Play In The Letters blastoderm
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Seven Letter Word Alert: (57 words)
aborted, albedos, amblers, armlets, baldest, bedlams, bedlars, beldams, blamers, blasted, blaster, bloated, bloater, boasted, boaster, boaters, boldest, bolster, bolters, borates, bromate, debtors, delator, earldom, earmold, labored, leotard, loaders, lobated, lobster, maestro, maltose, marbled, marbles, mobster, molders, morales, mortals, ordeals, radomes, rambled, rambles, reblast, reboast, reloads, remolds, roasted, smarted, smolder, sorbate, stabled, stabler, stardom, stormed, strobed, stromal, tramels