TUNNELING is a playable word

tunnel Scrabble® Dictionary

verb
tunneled, tunneling, tunnels or tunnelled, tunnelling, tunnels
to dig a tunnel (an underground passageway)
128 Playable Words can be made from "TUNNELING"
   2-Letter Words (13 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)