13-Letter Words Matching O__________A_

There are 15 13-letter words that match O__________A_. 3 are common words, such as OBSERVATIONAL and ONOMATOPOEIAS. A rarer one is OVIPOSITIONAL. 1 words contain a doubled letter.

Full list 15

observationalonomatopoeiasoveremotionalodontologicalorientationalornithischianosteomalaciasoverskepticalovertechnicalochlocraticalorismologicaloropharyngealoscillationalosteosarcomasovipositional

About this list

Words
15 (3 common words)
Common example
observational
Rare example
ovipositional
Doubled letters
1
Ending in S
3

Questions

How many 13-letter words matching o__________a_ are there?

15. 3 of them are common words.

What is a common example?

OBSERVATIONAL is among the common words in this set.