re: PRECOCIOUS - good point. Similarly - I suppose it's just about impossible to be tardy to the church service if you're PRELATE.

Some other prefixes lend themselves well to this kind of wordplay. I'm thinking of a chatboard where we came up with dozens (if not hundreds) of misreadings invoking DIS-, allegedly meaning "not." Or not.

DISASTER = remove a flower (or, if you're from Brooklyn, the flower at hand)
DISCOVER = your Frisbee is upside down

You get the idea.