What are some eight letter words with 1st letter I and 3rd letter F and 5th letter X and 6th letter I and 7th letter N?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 40 Words with the pattern --IFF---. That is, eight letter Words with 3rd letter I and 4th letter F and 5th letter F. In alphabetical order, they are:

chiffons

chiffony

cliffier

coiffeur

coiffing

coiffure

gliffing

griffins

griffons

skiffing

skiffled

skiffles

sniffers

sniffier

sniffily

sniffing

sniffish

sniffled

sniffler

sniffles

spiffied

spiffier

spiffies

spiffily

spiffing

stiffens

stiffest

stiffies

stiffing

stiffish

triffest

triffids

triffidy

whiffers

whiffets

whiffier

whiffing

whiffled

whiffler

whiffles