Words that start with 'col' and contain 't'

Which word that starts with 'col' and includes 't' is the most popular word?
There's 'collection' which ranks as the 1947^th most popular word.

In Scrabble, what's the best score you can get using words starting with 'col' that contain 't'?
As there are an enormous 394 entries, we'd suggest going for 'coltpixy' which scores 22 points.

What is the biggest word you can derive using this list?
The longest word is 18 characters, which is 'collectivistically'.

In total, how many words is it possible to make using this list?
There are up to 394 words covering all variations.

What is an unusual word from the combinations available on this page?
The most notable word from this list is 'colter'. The accepted definition of 'colter' is as follows: "A knife or cutter, attached to the beam of a plow to cut the sward, in advance of the plowshare and moldboard. [Written also coulter.]". Credit to the Oxford Dictionary.