10-Letter Words Matching O________R

There are 19 10-letter words that match O________R. 6 are common words, such as OFFICIATOR and ORIGINATOR. A rarer one is OXYGENATOR. In this set, T is the most frequent open letter (17 words). 6 words contain a doubled letter.

Full list 19

officiatororiginatoroscillatoroutfielderovermasteroverwinterobjurgatorobstructerobstructoroctangularoculomotoroutflatteroverlookerovermatterovipositorordinarieroutdeliveroutglitteroxygenator

About this list

Words
19 (6 common words)
Common example
officiator
Rare example
oxygenator
Doubled letters
6
Ending in S
0
Most frequent letter
T (17)

Questions

How many 10-letter words matching o________r are there?

19. 6 of them are common words.

What is a common example?

OFFICIATOR is among the common words in this set.