13-Letter Words Matching H_________O__

There are 25 13-letter words that match H_________O__. 4 are common words, such as HALLUCINATORY and HETEROGENEOUS. A rarer one is HYPOTHECATORS. In this set, T is the most frequent open letter (24 words). 4 words contain a doubled letter.

Full list 25

Common words

hallucinatoryheterogeneoushumanizationshypertensionshelminthologyhemicelluloseheteropterousheterosporoushymenopteroushabilitationshallucinatorshalogenations
hallucinatoryheterogeneoushumanizationshypertensionshelminthologyhemicelluloseheteropterousheterosporoushymenopteroushabilitationshallucinatorshalogenationshebraizationshematophagoushemodilutionsheterocystousheterokaryonshominizationshomologationshumificationshymenopteronshypercautioushyperreactorshypoeutectoidhypothecators

About this list

Words
25 (4 common words)
Common example
hallucinatory
Rare example
hypothecators
Doubled letters
4
Ending in S
21
Most frequent letter
T (24)

Questions

How many 13-letter words matching h_________o__ are there?

25. 4 of them are common words.

What is a common example?

HALLUCINATORY is among the common words in this set.