15-Letter Words Matching _R__O__________

There are 28 15-letter words that match _R__O__________. 7 are common words, such as FRIVOLOUSNESSES and PRECONDITIONING. A rarer one is TRISOCTAHEDRONS. 6 words contain a doubled letter.

Full list 28

Common words

frivolousnessespreconditioningprepositionallyproportionalityproportionatelyprovocativenesstrigonometricalorthodonticallyorthopsychiatryprenotificationproconservationariboflavinoses
frivolousnessespreconditioningprepositionallyproportionalityproportionatelyprovocativenesstrigonometricalorthodonticallyorthopsychiatryprenotificationproconservationariboflavinosesariboflavinosisorthogonalitiesorthogonalizingorthophosphatespreformationistpremodificationpreponderanciespreponderationspromotabilitiespromotivenessesproportionatingprosopographiesprotohistoriansprotoporphyrinsprotozoologiststrisoctahedrons

About this list

Words
28 (7 common words)
Common example
frivolousnesses
Rare example
trisoctahedrons
Doubled letters
6
Ending in S
15

Questions

How many 15-letter words matching _r__o__________ are there?

28. 7 of them are common words.

What is a common example?

FRIVOLOUSNESSES is among the common words in this set.