Words that start with 'b' and contain 'itm'

Dictionarypedia has discovered 4 suitable words.

6 letter words

  • bitmap

9 letter words

  • bitmapped

12 letter words

  • biscuitmaker

13 letter words

  • biscuitmaking

How many letters are in the largest word from this list?
'biscuitmaking', consisting of 13 letters.

What is the highest score you can get in Scrabble using this list of words that start with 'b' and include 'itm'?
As there is only 4 entries to pick from, you're obligated to select 'bitmap' for a total score of 12 points.

How many words could you make using the combination specified?
There are up to 4 words.