Sindarin 

celeg

adjective. *hasty, *[N.] agile, *swift
Sindarin [VT41/10] Group: Eldamo. Published by

celeg

adjective. swift, agile, hasty
Sindarin [Ety/366, PM/353, VT/41:10] Group: Hiswelókë's Sindarin Dictionary. Published by

heledh

noun. glass
Sindarin [PE17/037; RS/466; SA/khelek] Group: Eldamo. Published by

heledh

noun. glass
Sindarin [S/433] Group: Hiswelókë's Sindarin Dictionary. Published by

lagor

adjective. swift, rapid

The form lhegin in the published Etymologies might be a misreading for lhegrin, see VT/45:25. As noted by Bertrand Bellet, the two forms are listed side by side, and they may simply be doublets, but it is also possible that we have here a singular followed by its plural.

Sindarin [Ety/367, VT/45:25, Tengwestie/20050318, X/LH] Group: Hiswelókë's Sindarin Dictionary. Published by

lim

adjective. swift

adj. swift. Noro lim, noro lim Asfaloth. 'Run swift, run swift Asfaloth'. Q. limbe,#linta.

Sindarin [(PE17 Sindarin Corpus) PE17:18:147] < *_lĭmbĭ_. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

* celeg

swift

1) celeg (agile), lenited geleg, pl. celig, 2) lagor, analogical pl. legyr, 3) legrin (rapid), no distinct pl. form, 4) lint (no distinct pl. form)

* celeg

agile

celeg (swift), lenited geleg, pl. celig

* celeg

celeg

Probably OS keleka, from PQ kyelekâ, Root KYELEK

Sindarin [Tolkien Gateway] Published by

* heledh

glass

heledh (i cheledh, o cheledh), pl. helidh (i chelidh) if there is a pl.

* lagor

adjective. swift, rapid
Sindarin Group: Neologism. Published by

* bril

noun. glass, crystal
Sindarin Group: Eldamo. Published by