14-Letter Words Matching _R_O__________

There are 17 14-letter words that match _R_O__________. 1 are common words, such as PREOCCUPATIONS and ARBORICULTURAL. A rarer one is PREORDAINMENTS. In this set, I is the most frequent open letter (16 words). 3 words contain a doubled letter.

Full list 17

preoccupationsarboriculturalarboriculturesarrondissementergocalciferolpreoccupanciespreoperativelypreordinationsprioritizationcryobiologicalcryobiologistscryopreservingcryoprotectantcryoprotectivedryopithecinespreoperationalpreordainments

About this list

Words
17 (1 common words)
Common example
preoccupations
Rare example
preordainments
Doubled letters
3
Ending in S
7
Most frequent letter
I (16)

Questions

How many 14-letter words matching _r_o__________ are there?

17. 1 of them are common words.

What is a common example?

PREOCCUPATIONS is among the common words in this set.