15-Letter Words Matching ______O______S_

There are 18 15-letter words that match ______O______S_. 7 are common words, such as ANTIABORTIONIST and BLAMEWORTHINESS. A rarer one is SYNCHRONOUSNESS. 10 words contain a doubled letter.

Full list 18

antiabortionistblameworthinesscarnivorousnesscosmopolitanismphotojournalismphotojournalisttrustworthinessextemporarinessforthcomingnessgeochronologistmetropolitanismthromboembolismunseaworthinesscrashworthinessdichotomousnessdictatorialnessenantiomorphismsynchronousness

About this list

Words
18 (7 common words)
Common example
antiabortionist
Rare example
synchronousness
Doubled letters
10
Ending in S
10

Questions

How many 15-letter words matching ______o______s_ are there?

18. 7 of them are common words.

What is a common example?

ANTIABORTIONIST is among the common words in this set.