15-Letter Words Matching _______E__O____

There are 18 15-letter words that match _______E__O____. 3 are common words, such as HETEROGENEOUSLY and SLAUGHTERHOUSES. A rarer one is THYROIDECTOMIES. 2 words contain a doubled letter.

Full list 18

heterogeneouslyslaughterhousestonsillectomiesadenoidectomiesmastoidectomiespneumonectomiesprostatectomiespsychoneuroticssalpingectomiesthromboembolismadrenalectomiesantiforeclosurecontainerboardsnoncontemporarynonprofessorialsympathectomiesthermoperiodismthyroidectomies

About this list

Words
18 (3 common words)
Common example
heterogeneously
Rare example
thyroidectomies
Doubled letters
2
Ending in S
12

Questions

How many 15-letter words matching _______e__o____ are there?

18. 3 of them are common words.

What is a common example?

HETEROGENEOUSLY is among the common words in this set.