The word princelings 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: 22
Highest Scoring Words With Friends™ Play In The Letters princelings
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Seven Letter Word Alert: (39 words)
ceiling, clinger, cringes, crispen, girlies, girnels, incline, inlines, inspire, irenics, lensing, lignins, lingers, linings, lisping, pencils, piecing, pilings, pincers, pingers, pingler, pingles, pricing, princes, reclips, reicing, reining, rinsing, sericin, slicing, slinger, sniping, spicier, spicing, spinier, spinner, spiring, splenic, splicer