ungo noun "cloud, dark shadow" (UÑG)
Quenya
lumbulë
noun. dark shadow, heavy shadow; deep in shadow
ungo
cloud, dark shadow
fána
cloud
fána (2) noun "cloud" _(SPAN, VT46:15). _Cf. fana.
lumbo
cloud
lumbo noun "cloud" (pl. lumbor in Markirya), also glossed "gloom; dark, shade" (PE17:72, 168). In early "Qenya", lumbo was glossed "dark lowering cloud" (LT1:259)
mordo
shadow, obscurity, stain
mordo (1) noun "shadow, obscurity, stain" (MOR)
A noun used in the Namárië poem and loosely translated as “deep in shadow” (LotR/377), but more accurately “heavy shadow, dark shadow” (PE17/72, 168; RGEO/59). It is a derivative of the root √LUB “shadow” (PE17/168), perhaps an elaboration of ᴹQ. lumbe “gloom, shadow” from The Etymologies of the 1930s (Ety/LUM).
Neo-Quenya: Based on its use, I suspect lumbulë refers to a great expanse of shadow (“shadowness”) rather than an individual cast shadow, which is Q. hala.