"Terrestrious" is an uncommon word that is often replaced by more common synonyms such as earthy, land-based, or terrestrial. Other similar words include loamy, grounded, and soil-bound. These words describe something that pertains to or is characteristic of the earth or soil. Synonyms like planetary and worldly refer to our planet Earth as a whole or to the aspects of it that relate to the human experience. Meanwhile, words like mundane and commonplace can be used to describe everyday, ordinary, or unremarkable things, while words like ubiquitous or pervasive describe things that are found everywhere or affect everything. In general, there are multiple synonyms for "terrestrious" that can be used depending on the context and meaning of the sentence.