11-Letter Words Matching ____A___O__

There are 81 11-letter words that match ____A___O__. 30 are common words, such as ARCHAEOLOGY and ATTRACTIONS. A rarer one is ULTRASMOOTH. In this set, S is the most frequent open letter (57 words). 17 words contain a doubled letter.

Full list 81

Common words

archaeologyattractionscampanologyclimatologycomparisonscompassionscompatriotsdeclamatorydeclaratorydermatologydetractionsdispassions
archaeologyattractionscampanologyclimatologycomparisonscompassionscompatriotsdeclamatorydeclaratorydermatologydetractionsdispassionsexclamatoryexplanatoryextractionsheptathlonshullabaloosinfractionsintravenousmagnanimousoveranxiouspentathlonspolyandrousprecautionspreparatorypropagatorsrefractionsretractionssandalwoodssubcategoryeschatologyabreactionsacclamatoryacinaciformanfractuouscabbagewormcephalopodschamaeleonscompactionscomparatorsfarraginousglutathioneheptamerousmustachioednarratologyneonatologyonomatologypentamerousprecautiousprimatologyprofanatoryscalariformscarabaeoidstomatologyterraqueousthanatologythoracotomytrypanosomeunglamorousvolcanologyvulcanologycannabinoidcannabinolscochampionscollagenouscotransportfantabulousheptachlorsmiscaptionsmiscatalogsnonrailroadorphanhoodsoveractionspassageworkpreparatorspteranodonsretransformservanthoodstomatopodstetramerousultrasmooth

About this list

Words
81 (30 common words)
Common example
archaeology
Rare example
ultrasmooth
Doubled letters
17
Ending in S
45
Most frequent letter
S (57)

Questions

How many 11-letter words matching ____a___o__ are there?

81. 30 of them are common words.

What is a common example?

ARCHAEOLOGY is among the common words in this set.