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

In Scrabble, what's the highest score you can get from words that start with 's' and include 'pos'?
With the huge number of words to pick from, it's best to opt for 'symposia' scoring 15 points.

What's the most common word that starts with 's' and includes 'pos' in the dictionary?
The most popular word in the dictionary is 'suppose', which in fact is the 631^st most common word in this list.

What is the biggest word you can create from the combination searched for?
The word 'supposititiousness' has 18 characters.

How many words could one make using the specified combination?
There are 112 words available for any word that starts with 's' and includes 'pos'.

What is a weird word from the word combinations available on this list?
By far the most strange word in this list is 'supposititious'. The dictionary defines it as "1. Fraudulently substituted for something else; not being what is purports to be; not genuine; spurious; counterfeit; as, a supposititious child; a supposititious writing. Bacon. 2. Suppositional; hypothetical. [R.] Woodward. -- Sup*pos`i*ti"tious*ly, adv. -- Sup*pos`i*ti"tious*ness, n.".