There are 9 12-letter words that start with 'fro'.
| frogmarching | frontalities | frontiersman |
| frontiersmen | frontispiece | frostbitings |
| frostinesses | frothinesses | frozennesses |
Note: These 9 12-letter words that start with 'fro' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with fron, fros, frow, frog, frot, frou, frol, froc, from, froz, froe, fror.
4-letter words start with 'fro' (4)