When describing something that grew in size, there are many synonyms for the phrase "became larger" that can be used to add variety and interest to your writing. Common substitutes include "expanded," "swelled," "enlarged," "magnified," and "augmented." Other options include "increased in size," "grew bigger," "blossomed," "flourished," "developed," and "matured." It's important to choose a synonym that accurately reflects the degree of growth and context of the situation. Selecting an appropriate synonym can enhance the reader's understanding and experience of the text.