12-Letter Words Matching ____O____U__

There are 21 12-letter words that match ____O____U__. 11 are common words, such as CARBORUNDUMS and CONDOMINIUMS. A rarer one is PITTOSPORUMS. 2 words contain a doubled letter.

Full list 21

carborundumscondominiumsconnoisseursdiscomfiturediscomposurediscontinueddiscontinuesdiscothequesmicrocircuitmisconstruedmisconstruesheliogravuremicrocapsuleorthodonturephotogravureprovocateurscustomshouseleprosariumsmicroculturephotoproductpittosporums

About this list

Words
21 (11 common words)
Common example
carborundums
Rare example
pittosporums
Doubled letters
2
Ending in S
9

Questions

How many 12-letter words matching ____o____u__ are there?

21. 11 of them are common words.

What is a common example?

CARBORUNDUMS is among the common words in this set.