There are 18 words that end with 'ciest'.
| iciest | diciest | laciest |
| paciest | raciest | minciest |
| fanciest | juiciest | sauciest |
| spaciest | spiciest | priciest |
| bounciest | chanciest | fleeciest |
| jounciest | spruciest | flounciest |
Note: These 18 words that end with 'ciest' are found from the USA & Canada version of the tournament Scrabble word list.