10-Letter Words Matching ___O___U__

There are 27 10-letter words that match ___O___U__. 14 are common words, such as ARBORETUMS and AUTOIMMUNE. A rarer one is THEOLOGUES. 3 words contain a doubled letter.

Full list 27

Common words

arboretumsautoimmunebloodhoundcoloraturacolostrumsembouchurehomosexualhypotenuseideologuesmonologuesmotormouthpilothouse
arboretumsautoimmunebloodhoundcoloraturacolostrumsembouchurehomosexualhypotenuseideologuesmonologuesmotormouthpilothouseraconteursstrontiumsaltocumulidecompoundgynoeciumsmotortruckraconteusecolosseumsdoronicumshomologuesimposthumemonocoquesrecontourssinologuestheologues

About this list

Words
27 (14 common words)
Common example
arboretums
Rare example
theologues
Doubled letters
3
Ending in S
14

Questions

How many 10-letter words matching ___o___u__ are there?

27. 14 of them are common words.

What is a common example?

ARBORETUMS is among the common words in this set.