Is “Vertex” a Scrabble word?
Yes
VERTEX
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 Vertex
/vɜːteks/
noun
1.The highest point of something.
2.The highest surface on the skull.
3.The common point of the two rays of the angle, or its equivalent structure in polyhedra (meeting of edges) and higher order polytopes.
Synonyms: node, acme, apex, peak, top