Iff is a 3 letter English word. It's valid Words with friends word worth 9 points.
You can make 7 anagrams from letters in IFF (ffi).
And what wold ye doe with my bryde soe gay, iff I did sell her thee?
But that same reseit, iff your Honner so please, to cure a shrewish wife.
Mr. iff enquired in simple surprise: “Do you really care to know?”
I beg your pardon,” said the person addressed, icily; “my name is iff.
It was, in fact, the bandbox which had first fixed the interest of Mr. iff.
The iff, however, is not exactly an organization to be proud of.
Mr. Staff, I want you to shake hands with my friend, Mr. iff.
I could like her better, iff she was better to my young lady.
“He has his troubles,” quoth Mr. iff cheerfully, if vaguely.
iff elevated one of the glasses which had just been put before them.