13-Letter Words Matching H_________A__

There are 12 13-letter words that match H_________A__. 2 are common words, such as HETEROSEXUALS and HUMANITARIANS. A rarer one is HYPOPITUITARY. 1 words contain a doubled letter.

Full list 12

heterosexualshumanitarianshyaluronidasehymenopteranshypophosphatehypotheticalshemorrhoidalshereditarianshexobarbitalshyperarousalshypervigilanthypopituitary

About this list

Words
12 (2 common words)
Common example
heterosexuals
Rare example
hypopituitary
Doubled letters
1
Ending in S
8

Questions

How many 13-letter words matching h_________a__ are there?

12. 2 of them are common words.

What is a common example?

HETEROSEXUALS is among the common words in this set.