There are 13 words that start with 'cyclos'.
| cyclos | cycloses |
| cyclosis | cyclostome |
| cyclostyle | cycloserine |
| cyclostomes | cyclostyled |
| cyclostyles | cycloserines |
| cyclosporine | cyclostyling |
| cyclosporines | |
Note: These 13 words that start with 'cyclos' are found from the USA & Canada version of the tournament Scrabble word list.