9-Letter Words Matching ____O__A_

There are 154 9-letter words that match ____O__A_. 46 are common words, such as ADENOIDAL and AMAZONIAN. A rarer one is WAHCONDAS. In this set, I is the most frequent open letter (96 words). 14 words contain a doubled letter.

Full list 154

Common words

adenoidalamazonianambrosialambrosiasanacondasanchormanapologiasayatollahbetrothalcensorialcolloidalconcordat
adenoidalamazonianambrosialambrosiasanacondasanchormanapologiasayatollahbetrothalcensorialcolloidalconcordatcorporealcustodialcustodiandeprogramdraconianeditorialeuphoriasfactorialfellowmanhectogramhistogramhistorianmagnoliasmammogrammarmorealmicrobialmicroloanmonsoonalnoncombatnonsocialpatrolmanphotostatpictorialplutocratprotozoanradiogramreprogramsartorialschoolbagsteroidalsubnormalsubpoenasthyroidaltonsorialangiogramanthozoanauctorialauthorialcantorialcartogramchelonianchthoniancoelostatcolcotharconformalcursorialdystopiandystopiasealdormanenchorialfossorialhaemostatheliostatheliozoanhierogramhippocrashydrostathydrozoanhygrostatkissogrammarrowfatmicrogrammyotoniasnephogramneurogramnoncoitalochlocratphonogramphotogramphotoplaypictogramprosocialprotozoalraptorialrectorialschoolmansectorialstyrofoamsubsocialsuctorialsymposiactrinomialzirconiasanthocyanapologiaeaudiogrambedsoniaebedsoniasbignoniasbiosocialboltoniascambogiaschoroidalcladodialcladogramcycloidalcyclopeandiplopiasdiscoidaldissocialdystociasdystoniasepopoeiasethmoidalgolcondasgolgothasgorgonianhaplopiashemioliashypnoidallognormalmarmoreanmicrobeammiddorsalnondollarnonformalphotopiaspignoliasplutonianprecocialprecoitalpreformatpretorianprotostarrearousalrhizobialrhizoidalscalogramscotopiassensorialsigmoidalsociogramsporozoanstomodealsubtopiassuctoriansympodialtambourastithoniasvectorialvictoriaswahcondas

About this list

Words
154 (46 common words)
Common example
adenoidal
Rare example
wahcondas
Doubled letters
14
Ending in S
30
Most frequent letter
I (96)

Questions

How many 9-letter words matching ____o__a_ are there?

154. 46 of them are common words.

What is a common example?

ADENOIDAL is among the common words in this set.