"Not as much" is a phrase that indicates a smaller quantity or intensity of something. However, there are several synonyms available to express the same thought, including "less," "not so much," "to a lesser degree," "comparatively lower," "inferior," "reduced," "slim," "frugal," "scant," "limited," and "modest." These words can help you convey your message more effectively, depending on the context and tone of your language. Using appropriate synonyms will also prevent the repetition of the same phrase throughout your work, making it more engaging and informative for your readers.