The word subvocalising 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: 28
Highest Scoring Words With Friends™ Play In The Letters subvocalising
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Seven Letter Word Alert: (78 words)
abiosis, aboulic, abusing, agnosic, aisling, albinic, albinos, alginic, avionic, bailing, biasing, bivouac, boiling, bolivia, bonsais, bossing, bousing, bucinas, bussing, cabling, caisson, calving, casings, casinos, causing, cingula, closing, coalbin, coaling, coiling, consuls, cosigns, cousins, cussing, gliosis, glucans, gluonic, goblins, issuing, lacings, liaison, livings, losings, lousing, nicosia, oilcans, sabinos, sailing, salving, saucing, savings, scaling, sibling, signals, silicas, silicon, silvans, slaving, slicing, slogans, socials, soiling, solving, subgoal, subsoil, subsong, uncivil, unclogs, uncoils, valuing, vialing, vicious, violing, violins, viscous, visions, visuals, voicing