The phrase "in earths" can be interpreted in a few different ways, but there are several synonyms that can be used for each possible meaning. If "in earths" refers to being buried or interred, some synonyms include: buried, entombed, interred, laid to rest, planted, sepulchered. If it is interpreted to mean "in the world" or "on the planet," possible synonyms include: earthly, global, terrestrial, worldly. Finally, if "in earths" refers to the material or composition of something, synonyms could include: earthen, earthy, soil-based, composed of dirt or clay. Ultimately, the best synonym depends on the context and intended meaning of the phrase.