Flat, even.
even
Legato
level
You iron to smooth fabric.
I think they want dice but that's not really right because one of them is more properly a die.
bumpy, rugh
The word meaning "not smooth" is spelt rough.
Heist.
The Tagalog word "lantay" can mean "level" or "flat" when referring to something that is smooth or even. It can also mean "pure" or "unadulterated" when describing something that is untainted or sincere.
Smooth
it's a small Mexican dog that has smooth hair
level, soft, steady, shiny, gentle