coron (1) noun "mound" (SA); Coron Oiolairë ("Koron"), place-name: the "Mound of Eversummer" where the Two Trees grew. Also contracted Corollairë (WJ:401) and Corlairë (MR:107); both are spelt with an initial k in the sources.
Quenya
coron
noun. mound, mound; [ᴹQ.] globe, ball
coron
mound
coron
globe, ball
coron (2) ("k") (corn-, as in dat. sg. cornen) noun "globe, ball" (KOR)
coron oiolairë
place name. Mound Ever-summer
A fuller name of Corollairë, a combination of coron “mound”, oi(o) “ever” and lairë “summer” (WJ/401).
Corlairë
corlairë
Corlairë ("k"), place-name, apparently shortened from Corollairë, Coron Oiolairë (MR:107)
Corollairë
korollairë
Corollairë ("Korollairë"), place-name; see Coron Oiolairë.
Ezellohar
the green mound
Ezellohar noun "the Green Mound" where the Two Trees grew; adopted and adapted from Valarin; also translated as Coron Oiolairë, Corollairë (WJ:401). The name must have become *Erellohar in Exilic (Noldorin) Quenya.
lairë
summer
lairë (1) noun "summer" (Letters:283, VT45:26), in the calendar of Imladris a precisely defined period of 72 days, but also used without any exact definition (Appendix D). Oiolairë "Eversummer", name of a tree (UT:167), see also Coron Oiolairë. Lairelossë noun *"Summer-snow", name of a tree (UT:167), perhaps with white flowers.
oio
endless period
oio noun "an endless period" (CO) or adv. "ever" (SA:los). Oiolairë "Ever-summer" (name of a tree, UT:167; also in the name Coron Oiolairë, "Mound of Ever-summer". Oiolossë "Everwhite, Ever-snowwhite", a name of Taniquetil (OY), hence the translation "Mount Everwhite" in Tolkien's rendering of Namárië. See also SA:los. Explicit "mount" in Oron Oiolossë "Mount Everwhite" (WJ:403). Ablativic genitive Oiolossëo "from Mount Everwhite" in Namárië (Nam, RGEO:67, OY)
lairë
noun. summer
Ellairë
summer
Ellairë alternative name of June (PM:135); evidently incorporating lairë "summer"; the el- part is probably an assimilated form of er-, an element meaning one or first, June being the first summer month.
cumbë
mound, heap
cumbë ("k")noun "mound, heap" (KUB)
laire
noun. summer
A word glossed “mound” in the name Koron Oiolaire “Mound Ever-summer” in the Quendi and Eldar essay from 1959-60, also an element in Corollairë “Green Mound” from The Silmarillion (WJ/401; S/38; SA/coron). In The Etymologies of the 1930s, however, ᴹQ. koron was glossed “globe, ball” and was derived from the root ᴹ√KOR “round” (Ety/KOR). If “globe” is its primary meaning, then perhaps it could also refer to round hills as hemispheres.
In The Etymologies, its stem form was korn- as indicated by its (Middle Quenya) genitive kornen, likely the result of the Quenya syncope. The same reduction in inflected forms may apply to the later version of the word as well.