Yes,I'd say almost the same.
But you told it first,so I'm gonna say :
"The Bible of the Middle earth"

Magnificient

I'm surprised nobody wrote this before

historical

Debated. :p

- unfinished

ethereal

Complicated

Intense

compelling

doctored , or, for those of a different persuasion, emended.

nascent

tertiary

Nutty

Layered

I think the one word that sums up the Silmarillion, at least as I see it, it that it is many threads most dealing with...

Loss.

What exactly is it that's lost?

There are so many responses to this that my keyboard is smoking. In various losses of innocence, of perfection, of the trees, Silmarils, kingdoms, freedoms, lives, loves...though there are victories of "good" over "evil" here and there, the Silmarillion reads to me in sum like a long, slow defeat with periodic respites. A more detailed analysis of this topic might merit a separate thread from this one-word idea.

revealing

'l' of a story.

(Note, I perpetually omit the first 'l' of the jewels' name.)

Bleak

Iluvatar

loss

Several one-word descriptions of the book that I can think of.

Tragedy

Destiny

History

Bible

But if I had to sum it all up, I would say lumenyáre.

one word to rule them all
 

Revelation

From the many scattered leaves of lore
 

Christopher

Overcomplex


I'm hoping that's one word...

Norse

It looks a lot like Norse saga's tales edda's etc.. + Dwarves and Elves are taken from Norse mythology :rolleyes: . (That wasn't a negative thing by the way, I can imagene you see this as "Ripped from Norse mythology" but that wasn't my intention)

Teasing

Headace
got sore head reading this book, love it but sore lol :confused:

Homeric

Cosmological...
as opposed to cosmogonical, of course, which would only refer to the Ainulindalë specifically.

Short.

;)

Novel. (in both senses) :p

I think you've got there.

Fascinating!

Didactic

Fate

(On a side note, good to see you back, Ibrîniðilpathânezel. Just the other day Esty and I were worrying that it appeared you hadn't weathered the recent forum woes.)

Intricate

Changed (edited)

Distant (so far into the past that the stories are less detailed)

Elegiac

(Not in the sense of couplets... Perhaps couples ;) ).