There are 10 13-letter words that end with 'nizing'.
| civilianizing | decarbonizing |
| disorganizing | masculinizing |
| photoionizing | skeletonizing |
| outorganizing | prussianizing |
| suburbanizing | synchronizing |
Note: These 10 13-letter words that end with 'nizing' are found from the USA & Canada version of the tournament Scrabble word list.