The word collimations 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: 21
Highest Scoring Words With Friends™ Play In The Letters collimations
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Seven Letter Word Alert: (35 words)
actions, animist, atomics, atonics, cations, colitis, collins, coolant, iconism, iconist, install, instill, italics, liaison, lionism, lotions, masonic, million, miscall, miscoin, monilia, moonlit, motions, nicosia, oilcans, oolitic, osmotic, scotoma, silicon, solicit, somatic, somitic, stoical, tollman, toolman