15-Letter Words Starting With AU

There are 18 15-letter words that start with AU. 5 are common words, such as AUDACIOUSNESSES and AUTHENTICATIONS. A rarer one is AUTOTROPHICALLY. In this set, O is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 18

audaciousnessesauthenticationsauthoritativelyautobiographersautobiographiesautocorrelationautographicallyautolithographyautoradiographsautosuggestionsautotransformerautochthonouslyautomatizationsautoradiographyautotetraploidsautotetraploidyautotransfusionautotrophically

About this list

Words
18 (5 common words)
Common example
audaciousnesses
Rare example
autotrophically
Doubled letters
5
Ending in S
8
Most frequent letter
O (18)

Questions

How many 15-letter words starting with au are there?

18. 5 of them are common words.

What is a common example?

AUDACIOUSNESSES is among the common words in this set.