rotelë noun "cave" (LT2:347)
Quenya
rotto
cave, tunnel
rotelë
cave
felco
cave, mine, underground dwelling
felco noun "cave, mine, underground dwelling" (PE17:118); also felca, felehta
felya
cave
felya noun "cave" (PHÉLEG), "mine, boring, tunnel, underground dwel[ling]" (PE17:118)
rotto noun "cave, tunnel" (VT46:12), "a small grot or tunnel" (PM:365)