Interesting you bring this up. Curious our planet is not named 'Land' or after some Greek/Roman mythology like the others. While languages have different words for "Earth", they all get their meaning from ground or soil. Further, all languages do have a common origin, regardless what one believes about the garden of Eden. The somebody who taught Adam the words land and Earth was Jesus, who would also have known Earth means more than just soil, it is a planet. So even before anyone knew what a planet was, as far back as the origin of language, Earth was distinct from land
Earth is also the only planet with plate tectonics and oceans. The evidence is there if one looks for it, the evidence against it spawns from atheistic presuppositions. 99% of life died off this planet, it just depends in which presuppositions one accepts wether that happened 65 million years ago or not.