Word Puzzles

Here's a few word puzzle to coax your cerebal matter into action. Enjoy, and try not to bust a brain cell!!

#What two words end in -mt?

#What one word contains three consecutive sets of double letters?
eg. aa, bb, cc.

#Two words (that I know of) use each vowel once in order,
ie. a e i o u. What are they?

#What word has the most definitions (using the Oxford English Dictionary)?