There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
kemi
noun. earth, soil, land
kémi
feminine name. Earth-lady, Mother Earth
A very early name of Yavanna, glossed “Earth-lady” (LT1/79) and “Mother Earth” (GL/18). It is derived from the root ᴱ√KEME “soil” (QL/46).
sar
noun. earth, soil
A word for “earth, soil” in Early Qenya Word-lists of the 1920s, but it was marked with an “X” and ᴱQ. kemen (of similar meaning) was written next to it as an alternative (PE16/139).
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
An Early Qenya word derived from the root ᴱ√KEME and translated “earth, soil, land” in the Qenya Lexicon of the 1910s (QL/46) and as “earth, soil” in Poetic and Mythological Words of Eldarissa from this same period (PME/46). While this form and derivation are compatible with Tolkien later notions of the Elvish languages, I think it is better to use the later terms cemen for “earth, soil” and nór for “land”.