Words that start with 'i' and contain 'vis'

What is the longest word you can derive using words that start with 'i' and include 'vis'?
Consider 'improvisatorially', which consists of 17 letters.

What's the max number of words one can make using this combination of letters?
From this page of words that start with 'i' and contain 'vis', you have 67 fantastic entries which can be selected.

What is the highest number of points you can get in Scrabble from this list of words that start with 'i' and include 'vis'?
Our recommendation for a score of 15 points is the word 'incivism'.

Is there any word on this page that sticks out as the most common?
We've discovered that 'invisible' is the 5167^th most common word.

Is there an example of a particular word from this page of word that starts with 'i' and includes 'vis' which could be thought of as interesting?
The most notable word in our opinion is 'improvisation'. 'Improvisation''s definition is "1. The act or art of composing and rendering music, poetry, and the like, extemporaneously; as, improvisation on the organ. 2. That which is improvised; an impromptu.", according to the dictionary.