Is “Union” a Scrabble word?
Yes
UNION
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 Union
/ˈjuːnjən/
noun
1.The act of uniting or joining two or more things into one.
2.The state of being united or joined; a state of unity or harmony.
3.That which is united, or made one; something formed by a combination or coalition of parts or members; a confederation; a consolidated body; a league.
Synonyms: coalition, combination, junction
verb
1.To combine sets using the union operation.