Words that start with 'ar' and contain 'o'

What's the longest word you can derive from this list?
The biggest word on this list is 'archaeopterygiformes'. It has 20 letters.

What is a weird word on this list?
The most peculiar word in our opinion is 'arthromere'. The definition of 'arthromere' is as follows: "One of the body segments of Arthropods. See Arthrostraca. Packard.". Source Cambridge Dictionary.

What's the highest scoring word you can play in Scrabble ?
Considering the wide range of words to pick from, your best bet is 'archmock' which scores 21 points.

What's the maximum number of words you are able to construct from this list?
On this page of words that start with 'ar' and contain 'o', you have 1,102 fantastic combinations which are available.

Is there a word on this page that jumps out as the most common?
Rating as the 514^th most common word, you will want to ensure that you have 'around' written down.