There are 28 12-letter words that start with 'rein'.
Note: These 28 12-letter words that start with 'rein' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with reins, reinv, reinf, reint, reind, reinc, reinj, reinn, reino, reini, reinh, reink, reine, reinl.
5-letter words start with 'rein' (2)