13-Letter Words Matching _O________M__

There are 12 13-letter words that match _O________M__. 3 are common words, such as CONGRESSWOMAN and CONGRESSWOMEN. A rarer one is POLYRIBOSOMES. In this set, R is the most frequent open letter (11 words). 5 words contain a doubled letter.

Full list 12

congresswomancongresswomensocioeconomiclowerclassmancoastguardmancoastguardmenhomoiothermiclowerclassmenmonomorphemicnonprogrammerpolyribosomalpolyribosomes

About this list

Words
12 (3 common words)
Common example
congresswoman
Rare example
polyribosomes
Doubled letters
5
Ending in S
1
Most frequent letter
R (11)

Questions

How many 13-letter words matching _o________m__ are there?

12. 3 of them are common words.

What is a common example?

CONGRESSWOMAN is among the common words in this set.