talan (talam-, e.g. pl. talami) noun "floor, base, ground" (TALAM)
Quenya
talan
noun. flat space, platform, flat space, platform; [ᴹQ.] floor, ground
talan
floor, base, ground
talma
noun. flat space, platform
(cirya)talan
noun. deck (of a ship), main deck
sandastan
shield-barrier
sandastan noun "shield-barrier", a battle-formation (UT:282; probably with stem sandastam_- since the final element is derived from a stem stama- "bar, exclude". Compare _talan with stem talam- from the root TALAM.)
cólo
burden
cólo ("k")noun "burden" (VT39:10)
cólo
noun. burden
sandastan
noun. shield-barrier
A word for a “flat space, platform” in notes on Words, Phrases and Passages from the Lord of the Rings, cognate to S. talan and derived from ✶talam (PE17/52). In The Etymologies of the 1930s, ᴹQ. talan was glossed “floor, ground” under the root ᴹ√TALAM “floor, base, ground” (Ety/TALAM).
Neo-Quenya: For purposes of Neo-Quenya, I would use talan as a general word for a constructed “floor” or “platform” both with and without walls and possibly above ground level as well, but for natural “ground” I would use [ᴹQ.] hún (QL/39).