The word spongioblasts 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: 23
Highest Scoring Words With Friends™ Play In The Letters spongioblasts
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Seven Letter Word Alert: (74 words)
agonist, albinos, anglist, apologs, assigns, bassist, bassoon, basting, bastion, boating, bologna, bolting, boltons, bonsais, booting, bossing, galoots, goblins, gossips, isogons, lagoons, lapsing, lasting, looping, loosing, looting, losings, lotions, oblongs, oboists, obtains, ooplast, options, passing, passion, pasting, pistols, pistons, plating, platoon, plosion, poisons, pooling, postbag, postils, posting, potions, sabinos, saloons, salting, sapling, sassing, signals, slating, slogans, sloping, soaping, soloing, soloist, sooting, spigots, spinals, splints, stanols, tabling, tabooli, tapings, tobiano, tonsils, toolbag, tooling, topsail, topsoil, tossing