The word acclimatising 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: 26
Highest Scoring Words With Friends™ Play In The Letters acclimatising
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Seven Letter Word Alert: (48 words)
acclaim, aclinic, actinic, against, aisling, alginic, alicant, anglist, animals, animist, calming, casting, clastic, clinics, clitics, initial, intagli, italics, lacings, lacinia, laminas, lasting, listing, magical, mailing, maligns, malting, maniacs, matings, militia, misting, sailing, salting, satanic, scaling, sciatic, siccing, silicic, silting, slating, slicing, sliming, smiling, smiting, stamina, tailing, tilings, timings