11-Letter Words Matching O_______O__

There are 42 11-letter words that match O_______O__. 18 are common words, such as OBLIGATIONS and OBSERVATORY. A rarer one is OXYGENATORS. In this set, R is the most frequent open letter (36 words). 12 words contain a doubled letter.

Full list 42

Common words

obligationsobservatoryoccupationsodoriferousofficiatorsoppositionsoppressionsopprobriousordinationsoriginatorsornithologyoscillators
obligationsobservatoryoccupationsodoriferousofficiatorsoppositionsoppressionsopprobriousordinationsoriginatorsornithologyoscillatorsoscillatoryosculationsoutstationsoveranxiousovershadowsoverzealousobfuscatoryobjurgatoryoctahedronsommatophoreomnifariousonagraceousonomatologyorangewoodsornithopodsovariectomyovercuriousovipositorsozoniferousobstructorsobturationsorphanhoodsoveractionsoverborrowsoverexploitoverobviousoverpromoteoverrespondoverseriousoxygenators

About this list

Words
42 (18 common words)
Common example
obligations
Rare example
oxygenators
Doubled letters
12
Ending in S
31
Most frequent letter
R (36)

Questions

How many 11-letter words matching o_______o__ are there?

42. 18 of them are common words.

What is a common example?

OBLIGATIONS is among the common words in this set.