15-Letter Words Matching ___O______S____

There are 13 15-letter words that match ___O______S____. 3 are common words, such as INCONGRUOUSNESS and REMORSELESSNESS. A rarer one is SEROCONVERSIONS. In this set, N is the most frequent open letter (13 words). 7 words contain a doubled letter.

Full list 13

incongruousnessremorselessnessunconsciousnesshomogeneousnessignominiousnessthromboplastinsuncompromisableaccountantshipsendometriosisesmononucleosisesribonucleosidessaponaceousnessseroconversions

About this list

Words
13 (3 common words)
Common example
incongruousness
Rare example
seroconversions
Doubled letters
7
Ending in S
12
Most frequent letter
N (13)

Questions

How many 15-letter words matching ___o______s____ are there?

13. 3 of them are common words.

What is a common example?

INCONGRUOUSNESS is among the common words in this set.