13-Letter Words Matching __A________I_

There are 20 13-letter words that match __A________I_. 8 are common words, such as ANACHRONISTIC and CRAFTSMANSHIP. A rarer one is TRANSTHORACIC. In this set, R is the most frequent open letter (16 words). 1 words contain a doubled letter.

Full list 20

anachronisticcraftsmanshipdiaphragmaticdraftsmanshipgrantsmanshippharmacopoeiastatesmanshiptransatlanticarachnophobiablastogenesiscyanobacteriaflavopurpurinphallocentricpharmacologicanaphylactoidblastomycosisgranodioriticquasiperiodictransmountaintransthoracic

About this list

Words
20 (8 common words)
Common example
anachronistic
Rare example
transthoracic
Doubled letters
1
Ending in S
2
Most frequent letter
R (16)

Questions

How many 13-letter words matching __a________i_ are there?

20. 8 of them are common words.

What is a common example?

ANACHRONISTIC is among the common words in this set.