14-Letter Words Matching ________O__A__

There are 19 14-letter words that match ________O__A__. 2 are common words, such as PARALLELOGRAMS and VALEDICTORIANS. A rarer one is RADIOAUTOGRAPH. In this set, R is the most frequent open letter (19 words). 1 words contain a doubled letter.

Full list 19

parallelogramsvaledictoriansautoradiographbarometrographencephalogramsencephalographmicrobarographmyocardiographroentgenogramsroentgenographtelephotographultrasonographantimicrobialsautoradiogramscholangiogramsinterferogramsplethysmogramsplethysmographradioautograph

About this list

Words
19 (2 common words)
Common example
parallelograms
Rare example
radioautograph
Doubled letters
1
Ending in S
9
Most frequent letter
R (19)

Questions

How many 14-letter words matching ________o__a__ are there?

19. 2 of them are common words.

What is a common example?

PARALLELOGRAMS is among the common words in this set.