This word is indeclinable, according to the Etymologies
Sindarin
hûl
cry of encouragement in battle
cae
noun. earth
ceven
noun. Earth
dagor
noun. battle
dagor
noun. battle
ennorath
noun. central lands, middle-earth
lanc
noun. naked
lanc
adjective. naked
A word for “naked” in the name Amon Lanc “Naked Hill” (UT/280).
paran
adjective. naked
parch
adjective. naked
_ adj. _naked, of persons. Q. parka.
amar
earth
(archaic Ambar), pl. Emair
auth
battle
(war), pl. oeth, coll. pl. othath. Note: a homophone means "dim shape, apparition".
bâr
earth
(dwelling, house, home, family; land) (i mâr, o mbâr, construct bar), pl. bair (i mbair). Also -bar, -mar at the end of compounds.
cae
noun. earth
cae
earth
(i gae, o chae). No distinct pl. form even if there is a pl., except with article (i chae). For ”earth” as a substance, see also
ceven
earth
1) ceven (i geven, o cheven), pl. cevin (i chevin) (VT48:23), 2) (world) Amar (archaic Ambar), pl. Emair; 3) bâr (dwelling, house, home, family; land) (i mâr, o mbâr, construct bar), pl. bair (i mbair). Also -bar, -mar at the end of compounds. 4) (maybe ”earth” as substance) cae (i gae, o chae). No distinct pl. form even if there is a pl., except with article (i chae). For ”earth” as a substance, see also SOIL.
ceven
earth
(i geven, o cheven), pl. cevin (i chevin) (VT48:23)
dagor
battle
(noun) 1) dagor (i nagor, o ndagor), analogical pl. degyr (i ndegyr), coll. pl. dagorath. Archaic dagr, so we might have expected dagrath as the coll. pl.; dagorath would be an analogical formation. 2) (battle of two or a few, not a general host) maeth (i vaeth) (fight), no distinct pl. except with article (i maeth). 3) auth (war), pl. oeth, coll. pl. othath. Note: a homophone means "dim shape, apparition".
dagor
battle
(i nagor, o ndagor), analogical pl. degyr (i ndegyr), coll. pl. dagorath. Archaic dagr, so we might have expected dagrath as the coll. pl.; dagorath would be an analogical formation.
dagra
battle
(verb, "do battle, make war") dagra- (i nagra, i ndagrar), also dagrada- (i nagrada, i ndagradar)
dagra
battle
(i nagra, i ndagrar), also dagrada- (i nagrada, i ndagradar)
ennor
place name. central land, middle-earth
glavra
babble
glavra- (i **lavra, in glavrar**)
glavra
babble
(i ’lavra, in glavrar)
hell
naked
1) hell (lenited chell; pl. hill), 2) lanc (pl. lainc). Note: homophones means ”neck, throat” and also ”sharp edge, sudden end, brink”.
hell
naked
(lenited chell; pl. hill)
heltha
strip
(verb) heltha- (i cheltha, i chelthar). (VT46:14; in LR:386 s.v. SKEL the erroneous reading ”helta” appears.)
heltha
strip
(i cheltha, i chelthar). (VT46:14; in LR:386 s.v. SKEL the erroneous reading ”helta” appears.)
lanc
naked
(pl. lainc). Note: homophones means ”neck, throat” and also ”sharp edge, sudden end, brink”.
maeth
battle
(i vaeth) (fight), no distinct pl. except with article (i maeth).
ol-
verb. to pour
(i chûl, o chûl, construct hul), pl. huil (i chuil)