14-Letter Words Matching H_______O_____

There are 17 14-letter words that match H_______O_____. 7 are common words, such as HALLUCINOGENIC and HARPSICHORDIST. A rarer one is HYPODIPLOIDIES. In this set, I is the most frequent open letter (17 words). 3 words contain a doubled letter.

Full list 17

hallucinogenicharpsichordisthermaphroditeshermaphroditicherpetologistshomeschoolingshypothyroidismherpetologicalhydrochlorideshydrogenolysishallucinosiseshepatectomizedheteroploidiesheterotrophieshexamethoniumshydroperoxideshypodiploidies

About this list

Words
17 (7 common words)
Common example
hallucinogenic
Rare example
hypodiploidies
Doubled letters
3
Ending in S
11
Most frequent letter
I (17)

Questions

How many 14-letter words matching h_______o_____ are there?

17. 7 of them are common words.

What is a common example?

HALLUCINOGENIC is among the common words in this set.