There are 8 5-letter words that start with 'cas'.
| casas | cased | cases | casks | casky |
| caste | casts | casus | ||
Note: These 8 5-letter words that start with 'cas' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with cast, case, cass, cash, casu, casc, casi, cask, casa, casq, casb.
4-letter words start with 'cas' (5)