There are 321 15-letter words that start with 'c'.
Note: These 321 15-letter words that start with 'c' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with co, ca, ch, cr, cl, cu, ce, ci, cy, cz, ct, cn, cw.
3-letter words start with 'c' (39)