Fen

Fen is a low land covered wholly or partially with water; boggy land; a marsh

"The word fen is a very usual word in scrabble and admittedly many players put this word on the board without even knowing what it is. Well, do you?"

Feuilleton

Feuilleton (FOI-i-tn) is 

• a part of a European newspaper devoted to light literature, fiction or criticism. 
• It also refers to an item printed in the feuilleton.

"I assume that anyone who knows what feuilleton means also knows which page of a European newspaper it is found and what items are written there."

Fabulist

Fabulist (FAB-yuh-list) is a liar, a person who invents or relates fables.

The word fabulist is derived from the Middle French word, fabuliste which referred to someone who told fables.

"Nothing is off limits to this free-range fabulist. He can fold a dusty Persian carpet into the contours of the world itself and wring delight from every lustrous thread". (Clive Barker, The Essential Clive Barker)...source dictionary.com


But a person who likes or even loves to tell fables to kids may not be a liar in real. I believe so. Do you?

Fracas

Fracas (FREY-kuhs) is a noisy, disorderly disturbance or fight; riotous brawl; uproar.

It comes from the Italian word fracasso meaning "to beat".

Sentence example: 

• Three men were not there during the fracas so they intend to know what has started it.
• I can never stand a fracas at home, in neighbors or anywhere with anyone. Sometimes it's best to keep quiet and just let go of things that you knew would never make a difference even with your interference.

Fob

Fob is 

• (n) a short chain, usually with a medallion or similar ornament, worn hanging from a pocket.
• (n) a small pocket just below the waistline in trousers for a watch, keys, change, etc.
• (v) to cheat someone by substituting something spurious or inferior.
• (v) to put (someone) off by deception or trickery.

I just saw a clip in a movie showing fob (3rd definition). One man was standing right outside a girl's door who is holding a camera so to get rid of him she tricked him by saying he's standing in a right position for a nice photograph so she told him to go back and back a little more then she shut and locked her door. Nice one, huh! Well, she can't keep him away forever, can she? One day she has to confront whatever this man is up to with her. The movie, by the way, is Flight (2012) starring Denzel Washington. Haven't seen it yet.