There are plenty of synonyms for the phrase "soaks up" that can be used in different contexts. If you want to express the idea of absorption, you could use phrases like "absorbs," "soaks in," or "sucks up." If you're talking about learning material, you could use "absorbs," "takes in," or "learns." For the idea of enjoyment, phrases like "relishes," "enjoys," or "savors" could be used. If you're referring to sunshine, you could say "basks in" or "soaks in." Overall, there are many different synonyms to choose from depending on the context and meaning you want to convey.