I was in a SCRABBLE® game where my buddy had placed the word CAMPHORS on the board.
http://dictionary.reference.com/browse/CAMPHORS
In my tray, I had the letters Z Y X O BLANK E N
Giving the BLANK tile the value "B," I used my seven tiles to create the word BENZOXYCAMPHORS (a chemical compound word), by placing my 7 tiles in front of my opponent's 8-letter word, CAMPHORS.
Because an official SCRABBLE® board is only 15 sqaures by 15 squares, our word covered the entire board.
Sorry, but I don't recall how many points I scored with that word-creation, but I got an additional 50 points for using all 7 of my tiles.
That happened in the 1970s, and I have never repeated that kind of situation in any subsequent games I've played.
Thanks for an excellent question! It brought back some good memories.
+5