13-Letter Words Starting With AT

There are 19 13-letter words that start with AT. 6 are common words, such as ATROCIOUSNESS and ATTAINABILITY. A rarer one is ATYPICALITIES. In this set, I is the most frequent open letter (18 words). 16 words contain a doubled letter.

Full list 19

atrociousnessattainabilityattentivenessattitudinizedattitudinizesattributivelyatavisticallyatheisticallyattitudinizerattorneyshipsatherogenesesatherogenesisatomisticallyattitudinallyattitudinisedattitudinisesattractanciesattributionalatypicalities

About this list

Words
19 (6 common words)
Common example
atrociousness
Rare example
atypicalities
Doubled letters
16
Ending in S
9
Most frequent letter
I (18)

Questions

How many 13-letter words starting with at are there?

19. 6 of them are common words.

What is a common example?

ATROCIOUSNESS is among the common words in this set.