There are 12 words that start with 'nonun'.
| nonunion | nonunions |
| nonunique | nonuniform |
| nonunanimous | nonunionized |
| nonuniversal | nonuniformity |
| nonuniqueness | nonuniversity |
| nonuniformities | nonuniquenesses |
Note: These 12 words that start with 'nonun' are found from the USA & Canada version of the tournament Scrabble word list.