There are 8 14-letter words that start with 'pros'.
| proscriptively | prosencephalic |
| prosencephalon | prosperousness |
| prostaglandins | prosthetically |
| prosthodontics | prosthodontist |
Note: These 8 14-letter words that start with 'pros' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with prost, prose, proso, prosp, prosc, prosa, prosi, pross, prosy.
5-letter words start with 'pros' (5)