The word flavourings 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: 23
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (36 words)
airguns, favours, figural, flaring, flavins, flavors, flavour, florins, foaling, fouling, fungals, furling, furlong, gainful, infusor, insofar, insular, languor, langurs, loafing, lousing, ravings, rousing, rulings, salving, saviour, signora, slaving, soaring, solving, souring, surfing, urinals, vainful, valuing, various