The form dor in the Etymologies is a misreading, see VT/45. In composition and in toponyms, the word is nevertheless reduced to Dor
Sindarin
dôr
noun. land, *[N.] region where certain people live, *[ᴱN.] country, *[G.] people of the land
dôr
noun. land, dwelling-place, region where certain people live
dor
noun. land, dwelling-place, region where certain people live
* dôr
land1) dôr (i nôr, construct dor) (dwelling place, region), pl. dŷr (i ndŷr), coll. pl. dorath (WJ:413), 2) bâr (dwelling, house, home, family; earth) (i mâr, o mbâr, construct bar), pl. bair (i mbair). Also -bar, -mar at the end of compounds.
* dôr
dwelling placedôr (i nôr, construct dor) (land, region), pl. dŷr (i ndŷr) (WJ:413).
* dôr
dwelling placedôr (i nôr, construct dor) (land, region), pl. dŷr (i ndŷr) (WJ:413);
The form dor in the Etymologies is a misreading, see VT/45. In composition and in toponyms, the word is nevertheless reduced to Dor