15-Letter Words Matching _________O__A__

There are 20 15-letter words that match _________O__A__. 1 are common words, such as STRAIGHTFORWARD and CEPHALOCHORDATE. A rarer one is RECHROMATOGRAPH. In this set, R is the most frequent open letter (19 words). 1 words contain a doubled letter.

Full list 20

straightforwardcephalochordatemicrophotographphotomicrographradiophotographsubcontraoctavethermobarographastrophotographcounterblockadeechocardiogramselectromyogramselectromyographethnohistorianslymphangiogramsmacrophotographmicroradiographphotodissociatephotolithographprotohistoriansrechromatograph

About this list

Words
20 (1 common words)
Common example
straightforward
Rare example
rechromatograph
Doubled letters
1
Ending in S
5
Most frequent letter
R (19)

Questions

How many 15-letter words matching _________o__a__ are there?

20. 1 of them are common words.

What is a common example?

STRAIGHTFORWARD is among the common words in this set.