15-Letter Words Matching ____O_O________

There are 45 15-letter words that match ____O_O________. 11 are common words, such as ANALOGOUSNESSES and COSMOPOLITANISM. A rarer one is VIDEOCONFERENCE. In this set, I is the most frequent open letter (40 words). 12 words contain a doubled letter.

Full list 45

Common words

analogousnessescosmopolitanismfrivolousnessesneocolonialismsneocolonialistsphilosophicallyphotojournalismphotojournalistrephotographingtrigonometricalunpronounceablecosmopolitanize
analogousnessescosmopolitanismfrivolousnessesneocolonialismsneocolonialistsphilosophicallyphotojournalismphotojournalistrephotographingtrigonometricalunpronounceablecosmopolitanizecyanocobalaminshistocompatiblehydrocortisonesmacrocosmicallymetropolitanatemetropolitanismmicrocosmicallyorthodonticallyphotoconductionphototopographyunproportionateclamorousnessescyanocobalaminedichotomizationdichotomousnessglamorousnessesglucocorticoidsmicromorphologymicroporositiesmicrotonalitiesneurotoxicitiesorthogonalitiesorthogonalizingpaleozoologicalpaleozoologistsphotoconductivephotoionizationphototoxicitiesphytotoxicitiesprosopographiesprotoporphyrinsprotozoologistsvideoconference

About this list

Words
45 (11 common words)
Common example
analogousnesses
Rare example
videoconference
Doubled letters
12
Ending in S
20
Most frequent letter
I (40)

Questions

How many 15-letter words matching ____o_o________ are there?

45. 11 of them are common words.

What is a common example?

ANALOGOUSNESSES is among the common words in this set.