There are 16 words that start with 'grai'.
| grail | grain | grails |
| grains | grainy | grained |
| grainer | grainers | grainier |
| graining | grainiest | grainless |
| grainfield | graininess | grainfields |
| graininesses | ||
Note: These 16 words that start with 'grai' are found from the USA & Canada version of the tournament Scrabble word list.