The word colonisations 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: 19
Highest Scoring Words With Friends™ Play In The Letters colonisations
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Seven Letter Word Alert: (41 words)
actions, anionic, anoints, antlion, atonics, caisson, cannoli, cannolo, cantons, casinos, cassoon, cations, colitis, colossi, consist, contain, coolant, iconist, incants, italics, liaison, lotions, nations, niacins, nicosia, noncola, notions, oilcans, oncosis, oolitic, saloons, silicas, silicon, socials, solicit, soloist, stannic, stanols, stoical, tocsins, tonsils