12-Letter Words Matching ____O_____M_

There are 28 12-letter words that match ____O_____M_. 6 are common words, such as CARBORUNDUMS and CONDOMINIUMS. A rarer one is URICOTELISMS. In this set, R is the most frequent open letter (24 words). 3 words contain a doubled letter.

Full list 28

Common words

carborundumscondominiumsnationalismsrationalismsregionalismsteetotalismsachromatismsisomorphismsneuroticismsoophorectomycaprolactamsclitorectomy
carborundumscondominiumsnationalismsrationalismsregionalismsteetotalismsachromatismsisomorphismsneuroticismsoophorectomycaprolactamsclitorectomycorporatismsfibrosarcomahistoricismsleprosariumsmicroanatomyneuroanatomyneurofibromaosteosarcomapastoralismspersonalismsphotosystemspittosporumsprotophloemssardonicismstautomerismsuricotelisms

About this list

Words
28 (6 common words)
Common example
carborundums
Rare example
uricotelisms
Doubled letters
3
Ending in S
21
Most frequent letter
R (24)

Questions

How many 12-letter words matching ____o_____m_ are there?

28. 6 of them are common words.

What is a common example?

CARBORUNDUMS is among the common words in this set.