10-Letter Words Ending in ACK

There are 21 10-letter words that end in ACK. 6 are common words, such as CANVASBACK and KNICKKNACK. A rarer one is SUPERFLACK. In this set, E is the most frequent open letter (11 words). 7 words contain a doubled letter.

Full list 21

canvasbackknickknacklumberjacksmokestacksoundtrackswitchbackcornerbackdoodlesacknatterjacksaddlebacksupplejackturtlebackantihijackcrackajackfiddlebackhackmatackhydrocrackmultitrackpostattacksilverbacksuperflack

About this list

Words
21 (6 common words)
Common example
canvasback
Rare example
superflack
Doubled letters
7
Ending in S
0
Most frequent letter
E (11)

Questions

How many 10-letter words ending in ack are there?

21. 6 of them are common words.

What is a common example?

CANVASBACK is among the common words in this set.