Is “Adjoins” a Scrabble word?
Yes
ADJOINS
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 Adjoins
/əˈdʒɔɪnz/
verb
1.To be in contact or connection with.
“The living room and dining room adjoin each other.”
2.To extend an algebraic object (e.g. a field, a ring etc.) by adding to it (an element not belonging to it) and all finite power series of (the element).