There are many words but here are some that have 6 or more letters in them.
DEHORT, DHOOTI, DHOOTIE, DITHER, DOOLIE, DOTIER, DOTTEL, DOTTER, DOTTIER, DOTTLE, DOTTREL, EDITOR, EOLITH, HERIOT, HITTER, HOLDER, HOLIER, HOODIE, HOODIER, HOOLIE, HOOTER, HOTROD, HOTTED, HOTTER, HOTTIE, LITTER, LOITER, LOOTER, LOTTED, LOTTER, OOLITE, OOLITH, ORIOLE, OROIDE, OTOLITH, RETOOL, RIDOTTO, ROOTLE, ROOTLET, ROTTED, THEROID, THORITE, TILTER, TITHER, TOEHOLD, TOILER, TOILET, TOLEDO, TOOLER, TOOTER, TOOTLE, TOOTLER, TOROID, TOROTH, TORTILE, TOTHER, TRIODE, TRIOLET.