I dare you

For some time now I've been playing a game (one of those Facebook apps) which is very good to train your mind.

The aim is to form words in a minimum of time. The time given is 2 minutes and 30 seconds, and you get 6 letters. With these letters you have to make 16-19 words. The faster, the better! I've done a difficult 19 word combination in 13 seconds only two days ago.

Just give it a try. The letters are: E-V-R-O-S-R

You have to form 3x a 3-letter word, 8x a 4-letter word, 5x a 5-letter word and 1x a 6-letter word.

And this is one of the easiest combinations.

Got it?

The solutions are ERR- REV-ROE
                            ERRS-OVER-REVS-ROES-ROSE-ROVE-SORE
                            OVERS- ROVER-ROVES-SERVO-SORER
                            ROVERS