There are 14 words that start with 'grain'.
grain | grains | grainy |
grained | grainer | grainers |
grainier | graining | grainiest |
grainless | grainfield | graininess |
grainfields | graininesses | |
Note: These 14 words that start with 'grain' are found from the USA & Canada version of the tournament Scrabble word list.