What is the difference between nimbus and stratus clouds?

Nimbus clouds are typically associated with precipitation and are characterized by their dark, thick appearance. They often form as a result of rising moist air and can produce continuous rain. In contrast, stratus clouds are low, uniform layers that can cover the sky like a blanket, leading to overcast conditions but usually only produce light precipitation, such as drizzle. While both types of clouds can contribute to cloudy weather, nimbus clouds are more directly linked to significant rainfall.