VERTEX is a playable word

vertex Scrabble® Dictionary

noun
pl. vertexes or vertices
the highest point of something
26 Playable Words can be made from "VERTEX"
   2-Letter Words (5 found)
   3-Letter Words (10 found)
   4-Letter Words (6 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)