Words that contain 'op' and end in 'ia'

How many letters does the largest word from this page consist of?
'Hematoporphyrinuria', which has 19 letters.

Which word that has 'op' in and ends with 'ia' is the most common word?
The most common word is 'propria', which happens to be the 50538^th most popular word in the dictionary.

What is the highest score you can get in Scrabble using this list of words containing 'op' and ending with 'ia'?
As there are an extensive 802 entries, you may want to select 'oxyopia' which scores 19 points overall.

How many acceptable words are possible to make using this combination of letters?
It's possible to derive 802 words with this list.

Is there a distinct word from this page that could be deemed as unique?
The most unusual word from this list is 'hyperopia'. It is defined as "Hypermetropia. -- Hy`per*op"tic, a.".