Is “Upon” a Scrabble word?
Yes
UPON
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 Upon
/əˈpɒn/
adverb
1.Being the target of an action.
“He was set upon by the agitated dogs”
preposition
1.Physically above and in contact with.
“Place the book upon the table.”
2.Physically directly supported by.
“She balanced upon one foot.”
3.Being followed by another so as to form a series.
“hours upon hours, years upon years, mile upon mile of desert”
Synonyms: on, at