Is “Sticker” a Scrabble word?
Yes
STICKER
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Sticker
/ˈstɪkə(r)/
noun
1.Something or someone that sticks.
2.One who sticks to something, or does not give up; a stayer.
3.An adhesive label or decal.
verb
1.To apply one or more stickers to (something)
2.To mark as the sticker price