13-Letter Words Matching ___H_____O___

There are 19 13-letter words that match ___H_____O___. 2 are common words, such as ARCHITECTONIC and BACHELORHOODS. A rarer one is PATHOGNOMONIC. In this set, O is the most frequent open letter (14 words). 1 words contain a doubled letter.

Full list 19

architectonicbachelorhoodsamphidiploidsanthropologicanthroposophyarchidiaconalcephalothoraxmethaqualonesmethemoglobinorthohydrogenpathoneurosissiphonophoresamphidiploidyanthropomorphcephalosporingeohydrologicorthopteroidsoxyhemoglobinpathognomonic

About this list

Words
19 (2 common words)
Common example
architectonic
Rare example
pathognomonic
Doubled letters
1
Ending in S
6
Most frequent letter
O (14)

Questions

How many 13-letter words matching ___h_____o___ are there?

19. 2 of them are common words.

What is a common example?

ARCHITECTONIC is among the common words in this set.