15-Letter Words Matching A____________T_

There are 28 15-letter words that match A____________T_. 8 are common words, such as ACCOMPLISHMENTS and ACKNOWLEDGMENTS. A rarer one is ASTROBIOLOGISTS. In this set, I is the most frequent open letter (27 words). 7 words contain a doubled letter.

Full list 28

Common words

accomplishmentsacknowledgmentsaggrandizementsanthropologistsantidepressantsantiperspirantsaromatherapistsastrophysicistsabstractionistsantepenultimateanthropophagiteapproachability
accomplishmentsacknowledgmentsaggrandizementsanthropologistsantidepressantsantiperspirantsaromatherapistsastrophysicistsabstractionistsantepenultimateanthropophagiteapproachabilityarchiepiscopateaerodynamicistsagglutinabilityaluminosilicateanticapitalistsanticonvulsantsantifederalistsantimanagementsantimilitaristsantimonarchistsantimonopolistsantirationalityantiseparatistsarrondissementsassociationistsastrobiologists

About this list

Words
28 (8 common words)
Common example
accomplishments
Rare example
astrobiologists
Doubled letters
7
Ending in S
21
Most frequent letter
I (27)

Questions

How many 15-letter words matching a____________t_ are there?

28. 8 of them are common words.

What is a common example?

ACCOMPLISHMENTS is among the common words in this set.