Merry Christmas all,

Winter holidays are about to begin, and tomorrow will be the last academic day of this year. And we have already planned to hold a party and have some games in classroms. My classmate, Jan and me are the two for thinking some games in the tomorrow party. It's not an easy task actually!
Here is what we have come up with:
the students will be grouped according to their gender,
and then a boy and a girl from their group will be selected to write some vocabs on the blackboard according to the randomly picked up question,
for example writing as many vocabs as they can in which each vocab must consist of at least three B characters.
But up to this moment the question papers are not ready yet .
We have some dictionaries in hand but you know, we are running out of time.
We need some vocabs that are made up of several same characters.
Do you know any website that can help us out?

Thanks in advance!