Words that start with 'u' and contain 'pbu'

How many letters are in the longest word on this list?
The longest word is 10 characters, which is 'upbuilding'.

Which word that starts with 'u' and includes 'pbu' is the most common word in the dictionary?
We've identified that 'upbuilding' is the 95600^th most common word.

What word that starts with 'u' and includes 'pbu' is the most interesting?
By far the most interesting word from this list is 'upburst'. According to the dictionary, 'upburst' is defined as "The act of bursting upwards; a breaking through to the surface; an upbreak or uprush; as, an upburst of molten matter.".

In total, how many words could one make using the combination of letters specified?
There are up to a maximum of 13 entries covering all combinations.

What is the best score you're able to get in Scrabble from this list of words that start with 'u' and include 'pbu'?
Using this combination of letters, the best word you ought to play is 'upbubble' which gets 16 points.