Is “Upper” a Scrabble word?
Yes
UPPER
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 Upper
/ˈʌpə/
noun
1.A stimulant, such as amphetamine, that increases energy and decreases appetite.
2.The upper portion of something
3.Someone with higher social standing
adjective
1.At a higher level, rank or position.
2.Situated on higher ground, further inland, or more northerly.
3.(of strata or geological time periods) younger, more recent