EXTERN is a playable word

extern Scrabble® Dictionary

noun
pl. externs
a nonresident of an institution
29 Playable Words can be made from "EXTERN"
   2-Letter Words (7 found)
   3-Letter Words (9 found)
   4-Letter Words (7 found)
   5-Letter Words (5 found)
   6-Letter Words (1 found)