15-Letter Words Matching _____O____H____

There are 21 15-letter words that match _____O____H____. 2 are common words, such as BIBLIOGRAPHICAL and LEXICOGRAPHICAL. A rarer one is PSYCHOSYNTHESIS. In this set, I is the most frequent open letter (19 words). 3 words contain a doubled letter.

Full list 21

bibliographicallexicographicaloceanographicalphysiographicalstandoffishnesstribromoethanolzoogeographicalallelomorphismsantimonarchicalantimonarchistsbiogeographicaldichloroethaneshematoporphyrinheteromorphismsnonbiographicalnucleosynthesesnucleosynthesisnucleosyntheticpseudomorphismspsychosynthesespsychosynthesis

About this list

Words
21 (2 common words)
Common example
bibliographical
Rare example
psychosynthesis
Doubled letters
3
Ending in S
10
Most frequent letter
I (19)

Questions

How many 15-letter words matching _____o____h____ are there?

21. 2 of them are common words.

What is a common example?

BIBLIOGRAPHICAL is among the common words in this set.