Words that start with 'm' and contain 'si'

Which word in particular on this page contains the largest number of characters?
The largest word one can construct from the specified combination is 'macracanthrorhynchiasis', which consists of 23 characters.

What's the most common word that starts with 'm' and includes 'si' in the dictionary?
Ranking as the 1137^th most common word, you will want to ensure you have 'music' in your arsenal.

What's the total number of words you could make using this list?
On this page of words that start with 'm' and include 'si', there are 797 fantastic combinations that are available.

In Scrabble, what's the highest number of points you can get using words that start with 'm' and contain 'si'?
With the volume of words to select from, your best bet is to go for 'micasize' scoring 21 points.

Is there a specific word from this page that could be thought of as unique?
Dictionarypedia feels 'misapprehension' to be the most interesting word. According to the Oxford dictionary, 'misapprehension' means "A mistaking or mistake; wrong apprehension of one's meaning of a fact; misconception; misunderstanding.".