FIRE
Update:
N
D I
E F R
G A
Y
37 words in the list found so far:
AERIFY
DEAF
DEFRAY
DEFRAYING
DEFY
DEFYING
DEIFY
EDIFY
FADE
FADER
FADING
FAERY
FAIRY
FANG
FANGED
FAYRE
FEAR
FEARING
FEIGN
FEND
FIEND
FIERY
FIND
FINED
FINERY
FINGER
FRAYED
FRIDGE
FRIED
FRIEND
FRINGE
FRINGED
FRINGY
FRYING
GRIEF
INFER
RIFE
[+ 4 words not in the list:
DEFANG
DEFRAG
FARED
FRIG
31 words in the list to find...
FAIR!
→ Access for You: Registration - Find out how to register for our Access for You service.
→ Want to chat with other fellow-minded members? Head to our Off-topic section for some interesting chit-chat.
→ Check out our Priority board for tickets & offers updates, and to discuss all things Priority-related!
→ Welcome to O2! - New to O2? Find out all you need to know to get started!
If you'd like to take part, why not register? 
FIRE is correct and in the list [and will be included in next update]
FARING
AREFYING
FINE
DERAYING
