There are 11 words that start with 'dico'.
| dicot | dicots | 
| dicotyl | dicotyls | 
| dicoumarin | dicoumarol | 
| dicotyledon | dicoumarins | 
| dicoumarols | dicotyledons | 
| dicotyledonous | |
Note: These 11 words that start with 'dico' are found from the USA & Canada version of the tournament Scrabble word list.