12-Letter Words Containing FAT

There are 13 12-letter words that contain FAT. 5 are common words, such as GRANDFATHERS and INFATUATIONS. A rarer one is THIOSULFATES. 3 words contain a doubled letter.

Full list 13

grandfathersinfatuationsnonfatteningunfathomableunfathomablyfatherlinesshousefathersoverfatiguedfathomlesslyfatigabilitygodfatheringoverfatiguesthiosulfates

About this list

Words
13 (5 common words)
Common example
grandfathers
Rare example
thiosulfates
Doubled letters
3
Ending in S
6

Questions

How many 12-letter words containing fat are there?

13. 5 of them are common words.

What is a common example?

GRANDFATHERS is among the common words in this set.