10-Letter Words Starting With COS

There are 15 10-letter words that start with COS. 6 are common words, such as COSINESSES and COSMICALLY. A rarer one is COSTLESSLY. In this set, I is the most frequent open letter (12 words). 6 words contain a doubled letter.

Full list 15

cosinessescosmicallycosmonautscosponsorscostarringcostlinesscosmogoniccosmologiccosmopoliscossettingcostmariescostumierscoscriptedcosmogeniccostlessly

About this list

Words
15 (6 common words)
Common example
cosinesses
Rare example
costlessly
Doubled letters
6
Ending in S
7
Most frequent letter
I (12)

Questions

How many 10-letter words starting with cos are there?

15. 6 of them are common words.

What is a common example?

COSINESSES is among the common words in this set.