thâni

noun. land

A noun translated “land” (SD/435) appearing in the Adûnaic names for the Blessed Realm: Amatthâni and thâni’nAmân. Its Primitive Adûnaic form was also ✶thāni, though its primitive was glossed “realm" (SD/420).

thâni’namân

Land of Aman

A phrase demonstrating the use of the genitive prefix an-, elided to ’n in this case (SD/435). Earlier in the same discussion, Tolkien gave the non-elided (but less common) variant: thâni anAmân. It may be contrasted with the genitive compound Amatthâni in which the adjective element Amân appears first.

zâyan

noun. land

An Adûnaic word for “land” (SD/423). It has an irregular plural form zâin which is the result of the phonetic change (SD/423): [[pad|medial [w] and [j] vanished before [u] and [i]]]. Thus, the archaic plural changed from †zâyîn > zâîn > zâin.

Conceptual Development: In earlier names this word appeared as zen (SD/378, 385).