Flat, even.
even
Legato
level
I think they want dice but that's not really right because one of them is more properly a die.
You iron to smooth fabric.
bumpy, rugh
Heist.
The word meaning "not smooth" is spelt rough.
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