From what we know, the first games are one-word. And not like the remakes.
To be more specific I will name the 7 Heavenly Gems: Topaz; Gold as the setting sun Amethyst; Purple as violets Diamond; clear as ice Emerald; Green as lush Grass Lapis-lazuli; Midnight blue with pinpoints of silver Ruby; red as blood Opal; all Colors of the rainbow
Emerald and Ruby are already done.
Do You Want To Be The Ultimate Pokemon Master?
Credit to keshavkd. Alas many times my laziness prevails over creativity.