15-Letter Words Matching _____O_______S_

There are 30 15-letter words that match _____O_______S_. 5 are common words, such as ACRIMONIOUSNESS and CEREMONIOUSNESS. A rarer one is UNMELODIOUSNESS. In this set, I is the most frequent open letter (28 words). 16 words contain a doubled letter.

Full list 30

Common words

acrimoniousnessceremoniousnessmeritoriousnessphysiotherapistpsychotherapistanticolonialismepiscopalianismfashionablenessinopportunenessirrevocablenesspassionlessnesspsychobiologist
acrimoniousnessceremoniousnessmeritoriousnessphysiotherapistpsychotherapistanticolonialismepiscopalianismfashionablenessinopportunenessirrevocablenesspassionlessnesspsychobiologiststandoffishnessstereoisomerismallegoricalnessanthropopathismanticolonialistantiromanticismchronobiologistcryptozoologistemotionlessnessopenmouthednessopinionatednessparadoxicalnesspseudoscientistpsychophysicistsemicolonialismthermoperiodismunfavorablenessunmelodiousness

About this list

Words
30 (5 common words)
Common example
acrimoniousness
Rare example
unmelodiousness
Doubled letters
16
Ending in S
15
Most frequent letter
I (28)

Questions

How many 15-letter words matching _____o_______s_ are there?

30. 5 of them are common words.

What is a common example?

ACRIMONIOUSNESS is among the common words in this set.