There are 10 words that start with 'catn'.
| catnap | catnip | catnaps | 
| catnips | catnaper | catnapers | 
| catnapped | catnapper | catnappers | 
| catnapping | ||
Note: These 10 words that start with 'catn' are found from the USA & Canada version of the tournament Scrabble word list.