12-Letter Words Matching ____O___O___

There are 48 12-letter words that match ____O___O___. 9 are common words, such as HAEMORRHOIDS and METEOROLOGIC. A rarer one is TETRODOTOXIN. In this set, R is the most frequent open letter (36 words). 5 words contain a doubled letter.

Full list 48

Common words

haemorrhoidsmeteorologicmicrogroovesmicrosecondsosteoporosesosteoporosisproportionalproportionedrhinocerosesanchorpeopleanamorphosesanamorphosis
haemorrhoidsmeteorologicmicrogroovesmicrosecondsosteoporosesosteoporosisproportionalproportionedrhinocerosesanchorpeopleanamorphosesanamorphosiscuckooflowerdistortionalepanorthosesepanorthosisepimorphosisfemtosecondshydrochlorichydrofluoricleucocytosisosteoporoticphagocytosisprosopopoeiasarcomatosissensorimotorwithoutdoorsamazonstonesastrocytomasbuttonhookedcarbonadoingcatholicosescustomshousecyproteronesleukocytosesleukocytosismacrocytosesmacrocytosisneurohumoralphagocytosedphagocytosesphagocytoticphotochromicphytochromespreportionedprotophloemssarcomatosestetrodotoxin

About this list

Words
48 (9 common words)
Common example
haemorrhoids
Rare example
tetrodotoxin
Doubled letters
5
Ending in S
28
Most frequent letter
R (36)

Questions

How many 12-letter words matching ____o___o___ are there?

48. 9 of them are common words.

What is a common example?

HAEMORRHOIDS is among the common words in this set.