Words that start with 'kn' and contain 'a'

What's the largest word you can make from the combination searched for?
The largest word is 17 characters long, which is 'knowledgeableness'.

What's the highest number of points you can get in Scrabble using this list of words that start with 'kn' and contain 'a'?
As there are a vast 140 entries, you'll want to pick 'knyazi' scoring 22 points.

Is there any word on this page that stands out as the most popular?
There's 'knave', which is the 12410^th most common word.

How many usable words are possible to make using the combination specified?
One could derive 140 words with the combination of words that start with 'kn' and include 'a'.

Which is the most unusual word from this list?
A good example of an unusual word from this list goes to 'knitback'. 'Knitback''s definition is "The plant comfrey; -- so called from its use as a restorative. Dr. Prier.", according to the dictionary.