6-Letter Words Containing ATR

There are 13 6-letter words that contain ATR. 8 are common words, such as ATRIAL and ATRIUM. A rarer one is MATRES. In this set, I is the most frequent open letter (5 words). 0 words contain a doubled letter.

Full list 13

atrialatriumhatredmatrixmatronpatrolpatronsatrapiatriclatrianatronquatrematres

About this list

Words
13 (8 common words)
Common example
atrial
Rare example
matres
Doubled letters
0
Ending in S
1
Most frequent letter
I (5)

Questions

How many 6-letter words containing atr are there?

13. 8 of them are common words.

What is a common example?

ATRIAL is among the common words in this set.