12-Letter Words Matching _____O___R__

There are 45 12-letter words that match _____O___R__. 7 are common words, such as BILLIONAIRES and BRONTOSAURUS. A rarer one is ZILLIONAIRES. In this set, E is the most frequent open letter (35 words). 4 words contain a doubled letter.

Full list 45

Common words

billionairesbrontosauruschiaroscuroshelicopteredmillionairespostdoctoralthermometricarthrosporeschlorohydrinchloropicrinchronometricergonometric
billionairesbrontosauruschiaroscuroshelicopteredmillionairespostdoctoralthermometricarthrosporeschlorohydrinchloropicrinchronometricergonometricgametophoreshymenopteranlepidopteranplesiosauruspneumothoraxpsychometricrhombohedralrhombohedronactinometricamperometricankylosaurusblastosporeschromophoreschromophoriccraniosacraldilatometricdynamometricfellmongeredfluorometrichomoiothermshymenopteronkinetochoresmelanophoresmorphometriconychophoranoverconcernspogonophoranseismometrictensiometrictrichopterantrochophoresurediosporeszillionaires

About this list

Words
45 (7 common words)
Common example
billionaires
Rare example
zillionaires
Doubled letters
4
Ending in S
17
Most frequent letter
E (35)

Questions

How many 12-letter words matching _____o___r__ are there?

45. 7 of them are common words.

What is a common example?

BILLIONAIRES is among the common words in this set.