There are 19 13-letter words that start with 'k'.
Note: These 19 13-letter words that start with 'k' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ki, ke, ka, kn, ko, kr, kl, ku, kh, ky, kv, kw, kb.
2-letter words start with 'k' (2)