I guess I don't understand the rules - with 8 given letters to be used no more than once plus the common letter F how could one possibly get more than 2 four letter words plus the big word (INFORMANT) ? Any help
If "F" is the central letter then all you do is make as many words as you can from the given letters, but always including the "F" , and only using each of the other letters once.
Words must be at least four letters long, and you are not allowed to have any plurals or words that are capitalised.