What is the most popular word for this page?A popular word for your request is 'matter'.
What is the highest scoring word in Scrabble using the requested combination ?With an enormous 386 entries, it's best to try 'matchbox' which scores 24 points overall.
How many characters does the largest word on this page contain?The longest word that's possible to derive from this list is 'materialistically', and it has 17 characters.
How many words are possible to make using the specified combination?From this page of words which start with 'mat', you have 386 combinations that are available altogether.
What's a peculiar word from the combinations available on this page?The most notable word from this list is certainly 'mattress'. According to the Oxford dictionary, 'mattress' is defined as "1. A quilted bed; a bed stuffed with hair, moss, or other suitable material, and quilted or otherwise fastened. [Written also matress.] 2. (Hydraulic Engin.) A mass of interwoven brush, poles, etc., to protect a bank from being worn away by currents or waves.".