Quenya 

rondo

noun. cave, vaulted hall, vaulted or arched roof as seen from below (and usually not visible from outside); a (large) hall or chamber so roofed, vaulted or arched roof, vaulted hall
Quenya [PE17/117.4003; VT39/09.2101; WJ/414.2408] Group: Eldamo. Published by

rotto

cave, tunnel

rotto noun "cave, tunnel" (VT46:12), "a small grot or tunnel" (PM:365)

rotelë

cave

rotelë noun "cave" (LT2:347)

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)

Sindarin 

roth

noun. cave

n. cave. Q. rondo.

Sindarin [(PE17 Sindarin Corpus) PE17:117] -. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

groth

noun. cave, tunnel, large excavation
Sindarin [WJ/415, S/431, VT/46:12] Group: Hiswelókë's Sindarin Dictionary. Published by

groth

noun. delving, underground dwelling
Sindarin [WJ/415, S/431, VT/46:12] Group: Hiswelókë's Sindarin Dictionary. Published by

rond

noun. cave roof
Sindarin [Ety/384, VT/46:12, S/437, WJ/414, X/RH, X/ND1] Group: Hiswelókë's Sindarin Dictionary. Published by

rond

noun. vaulted or arched roof, as seen from below (and usually not visible from outside), or a (large) hall of chamber so roofed
Sindarin [Ety/384, VT/46:12, S/437, WJ/414, X/RH, X/ND1] Group: Hiswelókë's Sindarin Dictionary. Published by

gathrod

noun. cave
Sindarin Group: Eldamo. Published by

feleg

noun. cave

n. cave, mine, underground dwelling. Q. felco. Q.

Sindarin [(PE17 Sindarin Corpus) PE17:118] -. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

* grôd

cave

1) grôd (i **rôd, construct grod) (delving, excavation, underground dwelling), pl. grŷd (in grŷd) (WJ:414), 2) groth (i **roth) (delving, large excavation), pl. gryth (in gryth) (VT46:12), 3) rond (construct ron) (cavern, vault, vaulted ceiling, hall with vaulted roof), pl. rynd (idh rynd), coll. pl. ronnath, 4) roth (delving, large excavation), pl. ryth, 4) gathrod (i **athrod), pl. gethryd (i ngethryd = i ñethryd), 5) fela (pl. fili). In the Etymologies (LR:381 s.v. PHÉLEG) the name Felagund is said to include this word, but since Tolkien later re-explained this name as a borrowing from Dwarvish, some would consider fela** as a word for ”cave” conceptually obsolete.

Telerin 

felga

noun. cave
Telerin Group: Eldamo. Published by

Adûnaic

rôth

noun. foam, white crest of waves

An element appearing in the name Rothinzil “Foam-flower”, attested in later writings (1968) as roth (PM/369, 376). This later form is incompatible with the earlier phonetic rules of Lowdham’s Report from the 1940s, which allowed only long [ō] in Adûnaic words. If this word were used in the phonetic context of Lowdham’s Report (Middle Adûnaic), it should be rôth, and in these earlier texts, the Adûnaic name of Eärendi’s ship was Rôthinzil with a long ô (SD/360). Even in later writings, Tolkien lists róþ ([rōθ] = rôth) as one of its possible forms (PM/369). See the entry on conceptual-changes-in-late-Adûnaic for further discussion.

Adûnaic [PM/369.3801; PM/376.0810] Group: Eldamo. Published by

Noldorin 

rhond

noun. cave roof
Noldorin [Ety/384, VT/46:12, S/437, WJ/414, X/RH, X/ND1] Group: Hiswelókë's Sindarin Dictionary. Published by

rhonn

noun. cave roof
Noldorin [Ety/384, VT/46:12, S/437, WJ/414, X/RH, X/ND1] Group: Hiswelókë's Sindarin Dictionary. Published by

rond

noun. cave
Noldorin Group: Eldamo. Published by

rhonn

noun. cave, roof, cave
Noldorin [Ety/OS.043; Ety/ROD.007; EtyAC/ROD.005-2] Group: Eldamo. Published by

rhond

noun. vaulted or arched roof, as seen from below (and usually not visible from outside), or a (large) hall of chamber so roofed
Noldorin [Ety/384, VT/46:12, S/437, WJ/414, X/RH, X/ND1] Group: Hiswelókë's Sindarin Dictionary. Published by

rhonn

noun. vaulted or arched roof, as seen from below (and usually not visible from outside), or a (large) hall of chamber so roofed
Noldorin [Ety/384, VT/46:12, S/437, WJ/414, X/RH, X/ND1] Group: Hiswelókë's Sindarin Dictionary. Published by

gathrod

noun. cave
Noldorin [Ety/GAT(H).040] Group: Eldamo. Published by

gathrod

noun. cave
Noldorin [Ety/358] gath+grôd (GAT(H)). Group: Hiswelókë's Sindarin Dictionary. Published by

fela

noun. cave
Noldorin [Ety/PHÉLEG.011; Ety/PHÉLEG.013] Group: Eldamo. Published by

fela

noun. cave
Noldorin [Ety/381] Group: Hiswelókë's Sindarin Dictionary. Published by

Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Primitive elvish

rot

root. cave, delve underground, dig, excavate, tunnel, [ᴹ√] bore, [ᴱ√] hollow
Primitive elvish [PE17/049.3110; PE17/183.0501; PM/352.1008; PM/365.3108; VT39/09.0604; VT39/09.0811; WJ/414.2401; WJ/415.0308] Group: Eldamo. Published by

rǭda

noun. cave
Primitive elvish Group: Eldamo. Published by

Edain

rôs

noun. foam, white crest of waves
Edain [PM/369.3708] Group: Eldamo. Published by

Qenya 

rótele

noun. cave
Qenya [LT2A/Rothwarin.066; QL/080.6501] Group: Eldamo. Published by

orot

noun. cave
Qenya [QL/071.1301; QL/071.1302; QL/080.6504] Group: Eldamo. Published by

rondo

noun. cave, cave, cavern, cavern, roof, roof, cave
Qenya [Ety/ROD.004; EtyAC/ROD.005-1; PE21/08.2101] Group: Eldamo. Published by

felya

noun. cave
Qenya [Ety/PHÉLEG.007] Group: Eldamo. Published by

Doriathrin

rôth

noun. cave

A Doriathrin noun for “cave”, also appearing as roth, derived from primitive ᴹ✶rǭda or ᴹ✶roda (Ety/ROD, EtyAC/ROD). The [d] sprirantilized to [ð] (“dh”) as usual, then after the final vowel was lost the final [ð] became [θ] as suggested by Helge Fauskanger (AL-Doriathrin/roth). The original sound [ð] is preserved in the plural rodhin.

Doriathrin [Ety/ROD.015; Ety/ROD.017; Ety/ROD.026; EtyAC/ROD.045] Group: Eldamo. Published by

Old Noldorin 

phelga

noun. cave
Old Noldorin [Ety/PHÉLEG.009] Group: Eldamo. Published by

Middle Primitive Elvish

rod

root. cave, roof, cave
Middle Primitive Elvish [Ety/EL.052; Ety/NAUK.012; Ety/OS.045; Ety/ROD.001; EtyAC/NAUK.010; EtyAC/ROD.005; EtyAC/ROD.025] Group: Eldamo. Published by

rǭda

noun. cave
Middle Primitive Elvish [Ety/ROD.024; EtyAC/ROD.013; EtyAC/ROD.043] Group: Eldamo. Published by

pheleg

root. cave
Middle Primitive Elvish [Ety/PHÉLEG.001] Group: Eldamo. Published by

Middle Telerin

felga

noun. cave
Middle Telerin [Ety/PHÉLEG.004] Group: Eldamo. Published by

Gnomish

grûda

noun. cave
Gnomish Group: Eldamo. Published by

Early Noldorin

gorod

noun. cave
Early Noldorin Group: Eldamo. Published by