There are 9 13-letter words that start with 'cycl'.
| cyclicalities | cycloaddition |
| cyclodextrins | cyclohexanone |
| cycloheximide | cycloolefinic |
| cycloparaffin | cyclopropanes |
| cyclosporines | |
Note: These 9 13-letter words that start with 'cycl' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with cyclo, cycli, cycle, cycla.
5-letter words start with 'cycl' (2)