There are 4 14-letter words that start with 'cer'.
| ceremonialisms | ceremonialists | 
| certifications | ceruloplasmins | 
Note: These 4 14-letter words that start with 'cer' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with cere, cert, cera, cerv, ceru, ceri, cerc, cero, cerm, cern.
4-letter words start with 'cer' (2)