15-Letter Words Matching _R_________S___

There are 30 15-letter words that match _R_________S___. 11 are common words, such as ARBITRARINESSES and BROTHERLINESSES. A rarer one is TROUBLOUSNESSES. 29 words contain a doubled letter.

Full list 30

Common words

arbitrarinessesbrotherlinessescredulousnessesfractiousnessesfrightfulnessesfrivolousnessesfruitlessnessesgracelessnessesgrotesquenessesprimitivenessestremulousnesseserroneousnesses
arbitrarinessesbrotherlinessescredulousnessesfractiousnessesfrightfulnessesfrivolousnessesfruitlessnessesgracelessnessesgrotesquenessesprimitivenessestremulousnesseserroneousnessesgreensicknessestractablenessesbrainlessnessescrosslinguisticcrotchetinessesdreamlessnessesgrandiosenessesirasciblenessesirrationalisticirritablenessespracticalnessesprayerfulnessesprematurenessesprogressivisticpromotivenessesproximatenessestransistorisingtroublousnesses

About this list

Words
30 (11 common words)
Common example
arbitrarinesses
Rare example
troublousnesses
Doubled letters
29
Ending in S
26

Questions

How many 15-letter words matching _r_________s___ are there?

30. 11 of them are common words.

What is a common example?

ARBITRARINESSES is among the common words in this set.