Words with 'sig' at the start and 's' at the end

What word that starts with 'sig' and ends with 's' is the most unusual?
We consider that 'sightless' to be the most weird word. The conventional definition of 'sightless' is as follows: "1. Wanting sight; without sight; blind. Of all who blindly creep or sightless soar. Pope. 2. That can not be seen; invisible. [Obs.] The sightless couriers of the air. Shak. 3. Offensive or unpleasing to the eye; unsightly; as, sightless stains. [R.] Shak. -- Sight"less*ly, adv.- Sight"less*ness, n.". Credit to the Cambridge Dictionary.

What is the biggest word you can construct using this list?
The largest word found by our team is 'significativeness'.

What's the highest number of points you could get in Scrabble from this list of words beginning with 'sig' and ending with 's'?
It is possible to make 'sigfiles' scoring 12 in Scrabble.

How many viable words could one put together from this combination of letters?
You can make 54 words all in all.

What is the most common word for this page?
'Signs' is the most well-known word from this page, ranked 2490^th most common word.