13-Letter Words Matching A__________I_

There are 40 13-letter words that match A__________I_. 6 are common words, such as AMNIOCENTESIS and ANACHRONISTIC. A rarer one is AUTOPOLYPLOID. In this set, T is the most frequent open letter (34 words). 6 words contain a doubled letter.

Full list 40

Common words

amniocentesisanachronisticanticlimacticantispasmodicarchbishopricarchitectonicactinomorphicactinomycosisanisometropiaanthropogenicanthropologicantiapartheid
amniocentesisanachronisticanticlimacticantispasmodicarchbishopricarchitectonicactinomorphicactinomycosisanisometropiaanthropogenicanthropologicantiapartheidantiparasiticantipsychoticantiscorbuticantisymmetricapheliotropicarachnophobiaaspergillosisassociateshipastereognosisautocatalysisactinomycoticadventuristicallelomorphicallopolyploidaminoaciduriaamphitheatricanaphylactoidanisometropicantiarthriticantiarthritisantibourgeoisantiepilepticantimetabolicantirheumaticassistantshipatherogenesisautocatalyticautopolyploid

About this list

Words
40 (6 common words)
Common example
amniocentesis
Rare example
autopolyploid
Doubled letters
6
Ending in S
8
Most frequent letter
T (34)

Questions

How many 13-letter words matching a__________i_ are there?

40. 6 of them are common words.

What is a common example?

AMNIOCENTESIS is among the common words in this set.