Ok my friend shocked my by spelling JEELY - defintion, shallow lake. I added Y to make JEELY. and the word was accepted. Now to be honest I was not sure if it is actually a valid word or not.
Can you verify its not a misspelling in the games dictionary.
For English games, PyScrabble uses the ENABLE (Enhanced North American Bench LExicon) for word lookup. All I can say is that if the word is in there, PyScrabble will accept it.