FRANGIPANE is a 10 letter word that starts with F.
\Fran"gi*pane\, n. [F. frangipane; supposed to be called so from the inventor, the Marquis Frangipani, major general under Louis XIV.] 1. A perfume of jasmine; frangipani. 2. A species of pastry, containing cream and almonds.
WordNet Dictionary