When seeking a synonym for the word "bigger," there are a number of options available. One possibility is "larger," which implies a greater size or extent than something else. Another alternative is "greater," which can relate to size, importance, or intensity. "Grand," "huge," and "massive" are all options that suggest an impressive scale or size. If one is looking to convey a sense of majesty or grandeur, "gigantic" or "colossal" may be appropriate. Ultimately, the choice of synonym will depend on the context and desired implication, but there are myriad options to convey the meaning of "bigger".