13-Letter Words Starting With COS

There are 14 13-letter words that start with COS. 4 are common words, such as COSIGNATORIES and COSMETOLOGIES. A rarer one is COSURFACTANTS. In this set, S is the most frequent open letter (12 words). 1 words contain a doubled letter.

Full list 14

cosignatoriescosmetologiescosmetologistcosmopolitanscosmochemicalcosmographerscosmographiescosponsorshipcostermongerscosmeticizingcosmochemistscosmopolitismcostivenessescosurfactants

About this list

Words
14 (4 common words)
Common example
cosignatories
Rare example
cosurfactants
Doubled letters
1
Ending in S
9
Most frequent letter
S (12)

Questions

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

14. 4 of them are common words.

What is a common example?

COSIGNATORIES is among the common words in this set.