There are 3 15-letter words that start with 'pra'.
| practicableness | practicalnesses |
| prayerfulnesses | |
Note: These 3 15-letter words that start with 'pra' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with prac, prae, prat, pran, prag, prai, pray, praw, prax, pral, pras, praa, prah, praj, pram, prao, prau.
4-letter words start with 'pra' (5)