FREE-SOIL is a 9 letter word that starts with F.
\Free"-soil`\, a. Pertaining to, or advocating, the non-extension of slavery; -- esp. applied to a party which was active during the period 1846-1856. [U.S.] -- {Free"soil`er}, n. [U.S.] -- {Free"-soil`ism}, n. [U.S.]
WordNet Dictionary