Right, 7-8 years before.Roughly same time he wrote the Hobbit and introduced the term Moria.I guess he stumbled somehow upon the idea of Dwarves as a diaspora culture and it started to afflict his ideas on their language too, as i said.Numenoreans and Adunaic appear at the same time, it was his semitic period in conlanging.
I'd be careful about reading too much into similarities in names, as it's quite easy to get words in different languages which sound quite similar but have altogether different meanings or origins. In Tolkien's own recollection of coming up with the name "Moria", he denies any intentional connection to the Biblical Moriah.
"Incidentally the ending -
and (an), -end (en) in land-names no doubt owes something to such (romantic and other) names as
Broceliand(e), but is perfectly in keeping with an already devised structure of primitive (common) Elvish (C.E.), or it would not have been used. The element
(n)dor ‘land’, probably owes something to say such names as
Labrador (a name that might as far as style and structure goes be Sindarin). But
not to Scriptural
Endor. This is a case in reverse, showing how ‘investigation’ without knowledge of the real events might go astray.
Endor S.
Ennor (cf. the collective pl.
ennorath 1250) was invented as the Elvish equivalent of Middle-earth by combining the already devised
en(ed) ‘middle’ and
(n)dor ‘land (mass)’, producing a supposedly ancient compound Q.
Endor, S.
Ennor. When made I of course observed its accidental likeness to
En-dor (I Sam. xxviii), but the congruence is in fact accidental, and therefore the necromantic witch consulted by Saul has no connexion or significance for
The L.R. As is the case with
Moria. In fact this first appeared in
The Hobbit chap. 1. It was there, as I remember, a casual ‘echo’ of
Soria Moria Castle in one of the Scandinavian tales translated by Dasent. (The tale had no interest for me: I had already forgotten it and have never since looked at it. It was thus merely the source of the sound-sequence
moria, which might have been found or composed elsewhere.) I liked the sound-sequence; it alliterated with ‘mines’, and it connected itself with the MOR element in my linguistic construction."
The Letters of J.R.R. Tolkien letter 297