There are 16 words that end with 'ctal'.
| octal | ductal |
| rectal | rictal |
| tectal | edictal |
| fractal | dialectal |
| oviductal | prerectal |
| colorectal | idiolectal |
| bidialectal | retinotectal |
| multidialectal | interdialectal |
Note: These 16 words that end with 'ctal' are found from the USA & Canada version of the tournament Scrabble word list.