There are 13 words that start with 'caten'.
| catena | catenae | catenas | 
| catenary | catenate | catenoid | 
| catenated | catenates | catenoids | 
| catenaries | catenating | catenation | 
| catenations | ||
Note: These 13 words that start with 'caten' are found from the USA & Canada version of the tournament Scrabble word list.