Words that start with 'h' and contain 'sm'

What's the most common word on this page?
We've discovered that 'heroism' is the 12124^th most common word.

What is the highest scoring word you can play in Scrabble ?
With the enormous number of words to decide on, your best choice is 'hobbyism' scoring 20 points.

What's the total number of words you are able to make using this combination of letters?
On this list of words starting with 'h' that contain 'sm', there are 309 combinations which are possible overall.

Is there an example word from this page of word that starts with 'h' and includes 'sm' which could be considered as interesting?
The most notable word based on a recently conducted poll is 'heterotopism'. 'Heterotopism' is defined as "1. (Med.) A deviation from the natural position; -- a term applied in the case of organs or growths which are abnormal in situation. 2. (Biol.) A deviation from the natural position of parts, supposed to be effected in thousands of years, by the gradual displacement of germ...", according to the English dictionary.

Which word on this page contains the largest number of letters?
'Hyperconstitutionalism' contains 22 letters, and is the longest word that's possible to make from this combination.