There are 23 10-letter words that start with 'ren'.
Note: These 23 10-letter words that start with 'ren' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with rene, reno, rena, rend, rent, reni, renu, renc, renn, renv, renm.
4-letter words start with 'ren' (2)