COLTAN is a playable word

coltan Scrabble® Dictionary

noun
pl. coltans
a black ore containing columbite and tantalite
53 Playable Words can be made from "COLTAN"
   2-Letter Words (10 found)
   3-Letter Words (17 found)
   4-Letter Words (17 found)
   5-Letter Words (8 found)
   6-Letter Words (1 found)