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!
el
conjunction. or
elc
noun/adverb. else, something else
ellon
masculine name. Ellon
eltas
masculine name. Eltas
eleg
adjective. other, else
elfel
adjective. different, like something else
elm(en)
noun. wonder; singular, marvelous or unique thing; something strange
elma-
verb. to marvel at, admire
elfrin(iol)
masculine name. Littleheart
elfrith
proper name. Littleheart
el(u)m
interjection. think of that!
elef
noun. half, half a ...
elegrin
adjective. different, strange
elf
noun. heart
elf(in)
cardinal. five
elt
noun. change
elt
noun. dig, poke (probe), tug, lug
elta-
verb. to draw, tug, lug; to thrust, dig, poke (inward)
eltha
adverb. or, otherwise
eltha-
verb. to alter, change
elwing
feminine name. Lake Foam
elfeg
adjective. half
limp(elis)
noun. drink of the fairies
limfelis
noun. drink of the fairies
crig
noun. elbow
gwindod
noun. elder tree; elderberry
A word appearing as G. gwindod “elder tree; elderberry” in the Gnomish Lexicon of the 1910s, a combination of G. gwin “woman” and G. dod “berry”, hence more literally “✱woman berry” (GL/45).
Neo-Sindarin: For purposes of Neo-Sindarin, I would update this word to ᴺS. gwennod “elder tree; elderberry, ✱(lit.) maiden berry” using the later word S. gwend “maiden”.
eglamar
place name. Elfinesse, Elfhome
cwenn
noun. Elf
funt
noun. elephant
lalm
noun. elm, elm-wood
lalmir
noun. elm tree
eglavain
proper name. Elfinesse?
hôs
proper name. Eld
larm
noun. elm, elm-wood
tilithrin
adjective. elfin
haimadri
adjective. lunch, food in morning, elevens
cweneglin
noun. *Elvish (Qenya)
faigri
noun. cruelty
cwedhrin
noun. *Elvish (Qenya)
horoth
adjective. age, eld, oldness
thaigra
adjective. choice, select, elegant
ilon
noun. sky
A word for “sky” in an early name list from the 1910s and appearing in a couple early names: G. Thlim Quing Ilon “✱Folk of the Heavenly Arc” and G. Cris o Teld Quing Ilon “Gully of the Rainbow Roof” (PE13/101, 104), the latter revised to G. Cris Ilbranteloth (LT2/202). In the contemporaneous Gnomish Lexicon, however, G. Ilon was the name of Ilúvatar (GL/50).
limfa
noun. drink of the fairies
A noun appearing as G. limp and longer limpelis in the Gnomish Lexicon of the 1910s with the gloss “the drink of the fairies” (GL/54). Tolkien tentatively revised these in pencil to limfa and limfelis, and these two forms appeared in a name list from this same period (PE15/7). These forms did not appear again, but its Quenya cognate ᴹQ. limpe “wine” appeared in The Etymologies of the 1930s (Ety/LIP).
mîr
noun. wine
The words for “wine” in the Gnomish Lexicon of the 1910s were (archaic) G. †mîr and (ordinary) G. miros (GL/57), both related to ᴱQ. miru “wine” from the contemporaneous Qenya Lexicon (QL/61).
Neo-Sindarin: In Tolkien’s later writing, S. mîr was “jewel” and S. miruvor was a loan word from Q. miruvórë, where the initial element was based on Val. mirub “wine” (PE17/37-38; WJ/399). As such I use ᴺQ. miru for “wine”, and I would also used ᴺS. miru for “wine” as another loan word from Quenya and an element in S. miruvor. This assumes both “wine” (from grapes) and miruvor were drinks introduced by the Noldor.
timbridhil
feminine name. Queen of Stars
Precursor to S. Elbereth from the Gnomish Lexicon from the 1910s, a combination of tim “star” and Bridhil “queen” (GL/24, 70). In this period, only its Qenya equivalent ᴱQ. Tinwetári was used in the narratives. The name did appear in the earliest Silmarillion drafts of the late 1920s (SM/82), and a variant of this name, N. Timbredhil, appeared in The Etymologies from the 1930s (Ety/TIN), but starting with the Lord of the Rings drafts from the 1940s, Tolkien consistently used Elbereth instead.
luithon
noun. sky
A word for “sky” in the Gnomish Lexicon of the 1910s, an elaboration of G. lui “blueness” (GL/55).
silwin
noun. swan
A word for “swan” in the Gnomish Lexicon of the 1910s (GL/67), probably related to ᴱQ. siloine of the same meaning (QL/83).
cwing
noun. bow
dai
noun. sky
ermabwed
masculine name. One-handed
ilfrin
masculine name. Littleheart
luim
adjective. blue
umboth-muilin
place name. Pools of Twilight
ailwing
feminine name. Lake Foam
alc(hor)
noun. shrine, fane, temple
alfa
noun. swan
alfuil(in)
noun. swan
alm
noun. back (from shoulder to shoulder), shoulders
alw(eg)
adjective. lofty (of living things, trees, men)
atha
cardinal. two
aust
noun. summer
cî
adverb. here
er
adjective. one
gailbridh(n)ir
feminine name. Queen of Stars
honn
noun. heart
ilbrant
noun. rainbow
ilf
noun. heart
lûm
noun. time
ost
noun. summer
suil
noun. daughter
thaig
noun. choice
tinthurwin
feminine name. Queen of Stars
fith
noun. single hair
a
preposition. from
alf
noun. swan
aluin
masculine name. Time
bart
noun. change
cailthi
noun. kiss
dori
noun. queen
engan
noun. spear
enn
noun. name
gail
noun. star
ilvrant
noun. rainbow
im
noun. fairy
le
preposition. and
lemp
noun. half
luin
adjective. blue
lôs
noun. flower
lûr
noun. slumber
miros
noun. wine
morth
noun. darkness
mu
preposition. from
o
preposition. from
olm
noun. dream
quing
noun. bow
safwen
noun. summer
sint
noun. spark
sui
noun. daughter
sî
adverb. here
turwin
noun. queen
tîr
noun. king
tûr
noun. king
um
pronoun. we
umin
pronoun. we
to
proper name. To
A noun appearing as G. crig “elbow” in the Gnomish Lexicon of the 1910s and related to G. carc “fang” (GL/25, 27) and so probably derived from the early root ᴱ√KṚKṚ from which Qenya “fang” words were derived (QL/48).
Neo-Sindarin: I think it is worth retaining ᴺS. crig “elbow” for purposes of Neo-Sindarin, but reimagined as an elaboration on √RIK “twist” (VT39/7).