There are 82 five-letter words ending in F in the Knoodle dictionary — the same accepted-guess list used by most daily word games, including Wordle. The full list is below, A–Z.
Before a final F, the most common fourth letters are F, O, I — worth remembering when the last tile is green and the middle is still open.
ALOOF
BLAFF
BLUFF
BOEUF
BRIEF
CALIF
CHAFF
CHIEF
CHOOF
CHUFF
CLIFF
CLOFF
DARAF
DECAF
DRAFF
DWARF
FEOFF
FLAFF
FLUFF
GANEF
GANOF
GLIFF
GONEF
GONIF
GONOF
GRAFF
GRIEF
GRIFF
GROOF
GROUF
GRUFF
HOUFF
HOWFF
KALIF
KENAF
KLOOF
METIF
MOTIF
NYAFF
PILAF
PLUFF
POUFF
PREIF
PRIEF
PROOF
QUAFF
QUIFF
QUOIF
SCAFF
SCARF
SCOFF
SCUFF
SCURF
SERIF
SHEAF
SHELF
SKEEF
SKELF
SKIFF
SKOFF
SLUFF
SNARF
SNIFF
SNUFF
SOWFF
SPIFF
SPOOF
STAFF
STIFF
STUFF
SWARF
SWERF
THELF
THIEF
TRAYF
TREIF
TREYF
TRIFF
WAUFF
WHARF
WHIFF
WHOOF
Stuck mid-puzzle? A quick scan of this list beats burning a guess. When you've found the word, keep the streak going.