There are 10 words that start with 'duod'.
| duodena | duodenal |
| duodenum | duodecimo |
| duodenums | duodecimal |
| duodecimos | duodecimals |
| duodecillion | duodecillions |
Note: These 10 words that start with 'duod' are found from the USA & Canada version of the tournament Scrabble word list.