Words that contain 'sp' and end in 'ng'

How many words are possible to make from words that have 'sp' in and end with 'ng'?
You can pick from up to 519 words covering all combinations.

In Scrabble, what is the highest number of points possible using words that contain 'sp' and end in 'ng'?
As there are a sizeable 519 entries, it's best to select 'specking' scoring 17 points in total.

What's the longest word you can create with words that have 'sp' in and end with 'ng'?
The biggest word on this page is 'hyperspiritualizing', and consists of 19 letters

What's the most common word on this page?
We've discovered that 'speaking' is the 1045^th most common word.

Is there an example of a word from this page of word that has 'sp' in and ends with 'ng' that could be thought of as unusual in any manner?
Ranking as the most weird word on this page is 'sparling'. It means "(a) The European smelt (Osmerus eperlanus). (B) A young salmon. (C) A tern. [Scot. & Prov. Eng.]".