Geophilic is a term used to describe organisms that thrive in soil or earth. If you're looking for synonyms, there are several alternatives you can use. One is earth-loving, which describes organisms that prefer living in soil or earth. Another is soil-dwelling, which refers to organisms that primarily reside in soil. Other synonyms for geophilic include earthbound, ground-dwelling, and soil-bound. Ground-loving, soil-inhabiting, and soil-oriented are also good options. Ultimately, the word you choose will depend on the context in which you're using it, as well as the intended tone and style of your writing.