14-Letter Words Matching _________O__A_

There are 18 14-letter words that match _________O__A_. 3 are common words, such as CONSPIRATORIAL and PHARMACOPOEIAS. A rarer one is SUBARACHNOIDAL. In this set, R is the most frequent open letter (17 words). 2 words contain a doubled letter.

Full list 18

conspiratorialpharmacopoeiasstaphylococcalanisometropiasconservatorialhypermetropiasechocardiogramelectromyogramethnohistorianextracorporealhydrocolloidallymphangiogrammultifactorialnomenclatorialpharmacopoeialprotohistorianspermatogonialsubarachnoidal

About this list

Words
18 (3 common words)
Common example
conspiratorial
Rare example
subarachnoidal
Doubled letters
2
Ending in S
3
Most frequent letter
R (17)

Questions

How many 14-letter words matching _________o__a_ are there?

18. 3 of them are common words.

What is a common example?

CONSPIRATORIAL is among the common words in this set.