Words that start with 'or' and contain 's'

What is the most common word that starts with 'or' and includes 's' in the dictionary?
There's 'orders', which is the 1226^th most common word.

How many letters does the biggest word from this page contain?
The longest word that's possible to assemble from words that start with 'or' and include 's' is 'orchidocelioplasty', which has 18 letters.

Is there an example word from this page that could be thought of as unusual in any regard?
An example of a weird word from this list is 'orientness'. According to the Oxford dictionary, 'orientness' means "The quality or state of being orient or bright; splendor. [Obs.] Fuller.".

What's the highest number of points you could get in Scrabble using this list of words that start with 'or' and contain 's'?
With a vast 507 entries, your best bet is 'oryzomys' scoring 25 points overall.

How many words could one make from this combination of letters?
You can pick from up to 507 words.