Words that contain 'd' and end in 'co'

What is the most common word for this page?
There's 'medico' which ranks as the 70434^th most common word.

What is the highest number of points you're able to get in Scrabble using this list of words that contain 'd' and end in 'co'?
For 21 points in Scrabble, you are able to use 'zydeco'.

Is there a word from this page of word that has 'd' in and ends with 'co' which might be deemed as unusual in any manner?
One of the most peculiar words from this page is 'draco'. 'Draco' is defined as "1. (Astron.) The Dragon, a northern constellation within which is the north pole of the ecliptic. 2. A luminous exhalation from marshy grounds. 3. (Zoöl.) A genus of lizards. See Dragon, 6.", according to the dictionary.

How many words can you make using this combination of letters?
You can choose from 13 entries on our page of words that contain 'd' and end in 'co'.

How many characters does the biggest word from this list contain?
Consider 'quadriportico'