There are 12 words that start with 'clado'.
| cladode | cladodes | cladodial | 
| cladogram | cladoceran | cladograms | 
| cladophyll | cladocerans | cladophylls | 
| cladogeneses | cladogenesis | cladogenetic | 
Note: These 12 words that start with 'clado' are found from the USA & Canada version of the tournament Scrabble word list.