13-Letter Words Matching ________O_A__

There are 37 13-letter words that match ________O_A__. 15 are common words, such as COMPASSIONATE and CONCESSIONARY. A rarer one is SUBVERSIONARY. In this set, N is the most frequent open letter (33 words). 8 words contain a doubled letter.

Full list 37

Common words

compassionateconcessionaryconfessionalsdiscretionarydispassionateexpeditionarygeostationaryinvitationalsprecautionaryprocessionalsprofessionalsproportionals
compassionateconcessionaryconfessionalsdiscretionarydispassionateexpeditionarygeostationaryinvitationalsprecautionaryprocessionalsprofessionalsproportionalsproportionatereincorporaterevolutionaryarchdeaconateconcretionaryconfectionarydevolutionaryillocutionaryinvolutionaryoverelaboratepolycarbonatepostdoctoratesubventionarytransitionaryanticorporateastrocytomataconclusionaryconvulsionarydeuteranomalydigressionaryepitheliomatanonstationaryonychophoranspogonophoranssubversionary

About this list

Words
37 (15 common words)
Common example
compassionate
Rare example
subversionary
Doubled letters
8
Ending in S
7
Most frequent letter
N (33)

Questions

How many 13-letter words matching ________o_a__ are there?

37. 15 of them are common words.

What is a common example?

COMPASSIONATE is among the common words in this set.