13-Letter Words Matching __O_____S____

There are 15 13-letter words that match __O_____S____. 4 are common words, such as AMORPHOUSNESS and BLOODLESSNESS. A rarer one is TROUBLOUSNESS. In this set, S is the most frequent open letter (14 words). 10 words contain a doubled letter.

Full list 15

amorphousnessbloodlessnessbroncobusterssportscasterssportscastinganomalousnesschondriosomesphotoemissionanonymousnessbiostatisticscloudlessnessphotoemissivesnollygosterstoothbrushingtroublousness

About this list

Words
15 (4 common words)
Common example
amorphousness
Rare example
troublousness
Doubled letters
10
Ending in S
11
Most frequent letter
S (14)

Questions

How many 13-letter words matching __o_____s____ are there?

15. 4 of them are common words.

What is a common example?

AMORPHOUSNESS is among the common words in this set.