13-Letter Words Matching ____O_M______

There are 21 13-letter words that match ____O_M______. 6 are common words, such as CONFORMATIONS and MALFORMATIONS. A rarer one is PREFORMULATES. 13 words contain a doubled letter.

Full list 21

conformationsmalformationsnoncommercialschoolmarmishschoolmasterssubcommitteesharbormastersphotoemissionsubcommissionsulfonmethaneuniformnessesdiscommendingnoncommitmentnoncommunistsperformativesphotoemissiveprecommitmentpreformationspreformattingpreformulatedpreformulates

About this list

Words
21 (6 common words)
Common example
conformations
Rare example
preformulates
Doubled letters
13
Ending in S
10

Questions

How many 13-letter words matching ____o_m______ are there?

21. 6 of them are common words.

What is a common example?

CONFORMATIONS is among the common words in this set.