The List
There are 80 5 letter words with F as the last letter. The highest scoring is QUIFF at 20 points in Scrabble. 3 carry three or more vowels, which makes them useful for dumping a vowel-clogged rack.
ALOOFBLAFFBLUFFBOEUFBRIEFCALIFCHAFFCHIEFCHOOFCHUFFCLIFFCLOFFDARAFDECAFDRAFFDWARFFEOFFFLAFFFLUFFGANEFGANOFGLIFFGONEFGONIFGONOFGRAFFGRIEFGRIFFGROOFGROUFGRUFFHOUFFHOWFFKALIFKENAFKLOOFMETIFMOTIFNYAFFPILAFPLUFFPOUFFPREIFPRIEFPROOFQUAFFQUIFFQUOIFSCAFFSCARFSCOFFSCUFFSCURFSERIFSHEAFSHELFSKEEFSKELFSKIFFSKOFFSLUFFSNARFSNIFFSNUFFSOWFFSPIFFSPOOFSTAFFSTIFFSTUFFSWARFSWERFTHELFTHIEFTREIFTRIFFWAUFFWHARFWHIFFWHOOF