There are 9 15-letter words that start with 'cl'.
| clamorousnesses | clandestineness |
| clandestinities | classifications |
| classlessnesses | claustrophobias |
| clearheadedness | cleistogamously |
| cloudlessnesses | |
Note: These 9 15-letter words that start with 'cl' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with cla, clo, cle, cli, clu, cly.
4-letter words start with 'cl' (18)