No, the word Earth is not an adverb.The word Earth is a noun (planet Earth / soil-related earth).It is also a verb (in electricity, "to earth (or ground) a wire").The closest adverb form of "Earth" is Earthly.
It could be our world - Earth. Or it could be soil - which is often called earth. Therefore, soil could be the word.
E
The Igbo word for "red earth" of the Western African origin is ajali.
A sentence using the word earth and space science is this.
Earth
Bling is not a Yiddish word or a Hebrew word.
The Yiddish word for grandmother is "Bubbe".
The Yiddish word for Yiddish is "Yidish" (יידיש).
The Yiddish word for darkness is "dunkel."
The Yiddish word for love is "libe."
The Yiddish word for white is "vays".
The Yiddish word for pretentious is "feygelekh."
The Yiddish word for trivia is "tseyneray."
The Yiddish word for boyfriend is "manekh."
The Yiddish word for messy is "פֿאָרשטערבט" (forshṭerbt).
The Yiddish word for freedom is "פֿרייַהייט" (friyayt).