Starting with what? Also, depends on what you call nice.
Kindhearted is a nice word. Knowledgeable is a nice word.
LustreLoveLikeLimitlessLovelyLadyLimelightLusciousLucky
immortal
· kangaroo
Quintessential Quidnunc
Outstanding is a nice word. It begins with the letter O.
Open Minded
· noble · notable
Rokko ( very tasty sweet in Turkey )
· jazzy · jolly · jovial · joyful · just
Yummy is a synonym of nice. It means that the food tastes great.
Xmas (maybe a bit of a stretch) Xenium (gift)