In total, how many possible words can you make using this list?It's possible to make 193 words with the combination you searched for.
Which word in particular on this page contains the highest number of characters?The longest word one can derive from the combination searched for is 'enterohemorrhage', which has 16 characters.
What's the most popular word that has 'm' in and ends with 'age'?A well-known word for the combination you searched is 'marriage'.
Is there an example word from this page of word that has 'm' in and ends with 'age' which could be thought of as unusual?Certainly one of the most unusual words from this list is 'dumpage'. It means "1. The act of dumping loads from carts, especially loads of refuse matter; also, a heap of dumped matter. 2. A fee paid for the privilege of dumping loads.".
What is the highest scoring word you can play in Scrabble ?Since there are a considerable 193 entries, your best bet is 'chummage' scoring 18 points.