You have ten minutes to find as many words as possible using the letters in the box.

Each word must use the centre letter.
Each word must be four letters long.
Letters may only be used once.
No plurals, foreign words or proper nouns, but verb forms ending in 's' are allowed.

15 words - average
20 words - good
25 words - very good
30 or more - excellent

There is one nine letter word for which the clue is:
Call into question, e.g can hell explode?