Words that start with 'ubu' and contain 's'

What is the maximum number of words you could put together using this list?
Unfortunately we have only retrieved a single word on our records 😠

In Scrabble, what's the highest possible score possible from this list of words that start with 'ubu' and include 's'?
As there is merely a single word possible, you're forced to select 'ubussu' for a total score of 8 points.