15-Letter Words Matching __O________S___

There are 20 15-letter words that match __O________S___. 7 are common words, such as AMORPHOUSNESSES and BLOODLESSNESSES. A rarer one is TROUBLOUSNESSES. In this set, S is the most frequent open letter (19 words). 17 words contain a doubled letter.

Full list 20

amorphousnessesbloodlessnessesbrotherlinessesfoolhardinessesgrotesquenessesphotosynthesizewholesomenessesanomalousnessesbiogeochemistryphototransistortoothsomenessesanonymousnessescloudlessnessescrosslinguisticcrotchetinessesevocativenessesprogressivisticpromotivenessesproximatenessestroublousnesses

About this list

Words
20 (7 common words)
Common example
amorphousnesses
Rare example
troublousnesses
Doubled letters
17
Ending in S
15
Most frequent letter
S (19)

Questions

How many 15-letter words matching __o________s___ are there?

20. 7 of them are common words.

What is a common example?

AMORPHOUSNESSES is among the common words in this set.