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

Which word that starts with 'sin' and ends with 's' is the most unique?
The most strange word from this page is 'sinewous'. The dictionary defines it as "Sinewy. [Obs.] Holinshed.".

What is the highest scoring word you can play in Scrabble ?
For a score of 13 points, you could use 'sinkages'.

Which word in particular from this list has the highest letter count?
'Singleheartedness' contains 17 characters, and is the largest word possible to make from this list.

How many acceptable words are possible to make with this list?
From this list of words with 'sin' at the start and 's' at the end, you have 68 entries that are available overall.

Is there any word on this page that jumps out as the most popular?
'Sins' is the most well-known word from this list, ranked 3726^th most common word.