Words that contain 'o' and end in 'ian'

What's the highest scoring word you can play in Scrabble ?
Given there are plenty of words to select from, we'd recommend picking 'mazovian' scoring 22 points in total.

What's a strange word from this page of words that have 'o' in and end with 'ian'?
We consider that 'potamian' to be the most strange word. The dictionary defines it as "A river tortoise; one of a group of tortoises (Potamites, or Trionychoidea) having a soft shell, webbed feet, and a sharp beak. See Trionyx.".

Is there any word on this page that sticks out as the most common?
'Historian' is the most well-known word from this list, ranked 7345^th most common word.

How many characters does the longest word on this list consist of?
The longest word that's possible to assemble from this list is 'electroballistician', which has 19 letters.

In total, how many words are possible to make using this combination of letters?
1,212 words.