[LadyBrooke]

Is it sentient? - No
A living creature/organism? - No
An object? - No
Is it smaller than an elf? - No
An event? - No
A place? - Yes
Is it in ME? - Yes
West of the Misty Mtns? - Yes.
In Eriador? - No
Was is on the surface in the third age? - No
Ummm a realm? - No, not according to Tolkien...it sort of fits the definition though....
Did dwarves, elves, or orcs create or improve it? - Way to be precise, ....hmm, well both elves and orcs were there at points, and there was some form of elvish settlement...
West of Sirion? - No
Tol Sirion/Tol-in-Gaurhoth? - No, Sorry
Was it inhabited by the Noldor? - Yes
West of the Arossiach? - Judging by the blurry little map I have, no, but I can't be entirely sure on that one....
Is it in Feanor's son's realms? - Yes...in fact, though Tolkien never calls it a realm...well, it is guarded by one of them....