$$\begin{array}{cc}\text{fallingdotseq}& \fallingdotseq \\ \text{fcy}& ф\\ \text{Fcy}& Ф\\ \text{female}& ♀\\ \text{ffilig}& ffi\\ \text{fflig}& ff\\ \text{ffllig}& ffl\\ \text{ffr}& 𝔣\\ \text{Ffr}& 𝔉\\ \text{filig}& fi\\ \text{FilledSmallSquare}& ◼\\ \text{FilledVerySmallSquare}& \blacksquare \\ \text{fjlig}& fj\\ \text{flat}& ♭\\ \text{fllig}& fl\\ \text{fltns}& ▱\\ \text{fnof}& ƒ\\ \text{fopf}& 𝕗\\ \text{Fopf}& 𝔽\\ \text{forall}& \forall \\ \text{ForAll}& \forall \\ \text{fork}& ⋔\\ \text{forkv}& ⫙\\ \text{Fouriertrf}& ℱ\\ \text{fpartint}& ⨍\\ \text{frac12}& ½\\ \text{frac13}& ⅓\\ \text{frac14}& ¼\\ \text{frac15}& ⅕\\ \text{frac16}& ⅙\\ \text{frac18}& ⅛\\ \text{frac23}& ⅔\\ \text{frac25}& ⅖\\ \text{frac34}& ¾\\ \text{frac35}& ⅗\\ \text{frac38}& ⅜\\ \text{frac45}& ⅘\\ \text{frac56}& ⅚\\ \text{frac58}& ⅝\\ \text{frac78}& ⅞\\ \text{frown}& ⌢\\ \text{fscr}& 𝒻\\ \text{Fscr}& ℱ\end{array}$$