Compost is told to a fertilizer type to better feed the soil where there is or will be some plant(s), in such a way that it is sufficiently rich in nutrients to achieve a good crop of that plant(s). . . This compost is a process where all natural and organic waste is used, so that, once disintegrated, they are part of "earth" super fertilizer NATURAL (without artificial chemicals). . . And "compostable" means that you MAY QUALIFY to be part of that compost (mixing soil with natural waste, basically fruits/vegetables/vegetables. . . although it is preferred that no citrus residues, as these are NOT compostable (if they rot and disintegrate naturally, but the acidity of those wastes are "bad" (undesirable) to achieve a good EFFECTIVE compost. . . Some synonyms, words or similar expressions can be disintegrable, bioaprobepable and beneficial natural waste, natural fertilizer