Worlds sufficiently different from Earth are monocosms, from our perspective. On Earth, temperatures range from -40 to +40. Change that to -75 to +5, and you've

Worlds sufficiently different from Earth are monocosms, from our perspective. On Earth, temperatures range from -40 to +40. Change that to -75 to +5, and you've got an ice planet, even though a species adapted to it might find -40 as different from -20 as we find a swamp from a savannah. Similarly if we encountered a planet identical to earth but where the sea level was 2km higher, we'd think of it as an ocean planet, no matter the biological or climatic differences between different ocean areas. All the while, aliens from a less watery world would certainly classify ours as an ocean planet. Or if we found a planet with the atmosphere of Venus, we might call it a fog planet, though any lifeforms living there might see in wavelengths that can penetrate that fog.