"Fat the land" is a phrase that means to enrich the soil or provide it with plentiful nutrients. There are several synonyms for this phrase, which include "fatten up the soil," "enrich the earth," "nourish the ground," "foster soil fertility," "boost soil health," "enhance soil vitality," and "stimulate soil growth." These synonyms all reflect the same idea of improving the quality of the soil so that plants can grow healthily. Whether you prefer to use "fat the land," "enrich the earth," or another synonym, the key is to provide your soil with the nutrients it needs to thrive.