Index - F
| false | Twee.Constraints |
| fcat | Twee.Pretty, Twee.Base |
| FIFO | |
| 1 (Type/Class) | Twee.Queue |
| 2 (Data Constructor) | Twee.Queue |
| filter | Twee.Index |
| find | |
| 1 (Function) | Twee.Label |
| 2 (Function) | Twee.Index |
| first | Twee.Pretty, Twee.Base |
| fixedArity | Twee.Pretty, Twee.Base |
| flattenSubst | Twee.Term, Twee.Base |
| float | Twee.Pretty, Twee.Base |
| foldSubst | Twee.Term, Twee.Base |
| formAnd | Twee.Constraints |
| forMSubst_ | Twee.Term, Twee.Base |
| Formula | Twee.Constraints |
| freeze | |
| 1 (Function) | Twee.Index |
| 2 (Function) | Twee.Indexes |
| from | |
| 1 (Function) | Twee.Label |
| 2 (Function) | Twee |
| fromFun | Twee.Term, Twee.Base |
| fromInt | Twee.Term, Twee.Base |
| fromSymbol | Twee.Term.Core |
| fromTerm | Twee.Constraints |
| fromTermList | Twee.Term, Twee.Base |
| Frozen | |
| 1 (Type/Class) | Twee.Index |
| 2 (Data Constructor) | Twee.Index |
| fsep | Twee.Pretty, Twee.Base |
| fullRender | Twee.Pretty, Twee.Base |
| Fun | |
| 1 (Type/Class) | Twee.Term.Core, Twee.Term, Twee.Base |
| 2 (Data Constructor) | Twee.Term.Core, Twee.Term, Twee.Base |
| fun | |
| 1 (Function) | Twee.Term, Twee.Base |
| 2 (Function) | Twee.Index |
| Function | |
| 1 (Data Constructor) | Twee.Base |
| 2 (Type/Class) | Twee.Base |
| FunOf | Twee.Base |
| funs | |
| 1 (Function) | Twee.Constraints |
| 2 (Function) | Twee.Base |