There are 15 words that start with 'synco'.
| syncom | syncoms | syncope |
| syncopal | syncopes | syncopic |
| syncopate | syncopated | syncopates |
| syncopator | syncopating | syncopation |
| syncopative | syncopators | syncopations |
Note: These 15 words that start with 'synco' are found from the USA & Canada version of the tournament Scrabble word list.