12-Letter Words Matching _______O__I_

There are 24 12-letter words that match _______O__I_. 2 are common words, such as CATASTROPHIC and PHARMACOPEIA. A rarer one is TRIMETHOPRIM. In this set, R is the most frequent open letter (21 words). 2 words contain a doubled letter.

Full list 24

catastrophicpharmacopeiaflavoproteinglucoproteinglycoproteinhypertrophiclactoproteinorthorhombicprototrophicsalpiglossisspermatozoidantistrophicantithrombinblastocoelicdouroucoulisenterocoelicluteotrophicluteotrophinoligotrophicporphyropsinsansculotticthyrotrophicthyrotrophintrimethoprim

About this list

Words
24 (2 common words)
Common example
catastrophic
Rare example
trimethoprim
Doubled letters
2
Ending in S
2
Most frequent letter
R (21)

Questions

How many 12-letter words matching _______o__i_ are there?

24. 2 of them are common words.

What is a common example?

CATASTROPHIC is among the common words in this set.