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

Which word from this list contains the largest number of letters?
'Shadowgraphist' is the longest word that the Dictionarypedia database could locate, containing 14 characters

What's an unusual word from all the combinations available ?
The most strange word in our opinion is 'sparrowgrass'. The common definition of 'sparrowgrass' is as follows: "Asparagus. [Colloq.] See the Note under Asparagus.". Source Cambridge Dictionary.

In total, how many possible words can you make using this combination of letters?
On this page of words that start with 's' and include 'wgr', Dictionarypedia has discovered 6 entries that are possible overall.