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

What is the highest scoring word in Scrabble you can play for ?
For a score of 15 points, it is possible to use 'cumbered'.

How many letters are in the longest word from this list?
'Cumbersomeness', which consists of 14 characters.

Which word that starts with 'cum' and includes 'b' is the most common word in the dictionary?
The most popular word is 'cumbrous', which is actually the 36258^th most popular word in the dictionary.

Is there a word from this page of word that starts with 'cum' and includes 'b' which might be thought of as unique?
Certainly one of the most peculiar words from this page is 'cumbent'. 'Cumbent' is defined as "Lying down; recumbent. J. Dyer.", according to the English dictionary.

What's the maximum number of words one can assemble from this list?
Altogether, there are 29 words.