| fail | Language.Fay.Prelude |
| False | Language.Fay.Prelude |
| Fay | Language.Fay.Types, Language.Fay.FFI, Language.Fay.Prelude, Language.Fay |
| fayBuiltin | Language.Fay.Compiler.Misc |
| faySourceDir | Language.Fay.Types, Language.Fay |
| fayToJsDispatcher | Language.Fay.Compiler.FFI |
| ffi | Language.Fay.FFI |
| FfiFormatBadChars | Language.Fay.Types, Language.Fay |
| FfiFormatIncompleteArg | Language.Fay.Types, Language.Fay |
| FfiFormatInvalidJavaScript | Language.Fay.Types, Language.Fay |
| FfiFormatNoSuchArg | Language.Fay.Types, Language.Fay |
| FfiNeedsTypeSig | Language.Fay.Types, Language.Fay |
| filter | Language.Fay.Prelude |
| find | Language.Fay.Prelude |
| findTopLevelNames | Language.Fay.ModuleScope |
| flip | Language.Fay.Prelude |
| floor | Language.Fay.Prelude |
| foldl | Language.Fay.Prelude |
| foldl1 | Language.Fay.Prelude |
| foldr | Language.Fay.Prelude |
| foldr1 | Language.Fay.Prelude |
| force | |
| 1 (Function) | Language.Fay.Compiler.Misc |
| 2 (Function) | Language.Fay.Prelude |
| Foreign | Language.Fay.FFI |
| forM_ | Language.Fay.Prelude |
| fromInteger | Language.Fay.Prelude |
| fromIntegral | Language.Fay.Prelude |
| fromRational | Language.Fay.Prelude |
| fst | Language.Fay.Prelude |
| FuncArity | Language.Fay.Compiler.Optimizer |
| FunctionType | Language.Fay.Types, Language.Fay |
| FundamentalType | Language.Fay.Types, Language.Fay |