The term 'sizzed' means a hissing or frying sound usually produced by something hot or boiling. When it comes to synonyms for the word 'sizzed,' a few options come to mind, such as crackled, seared, simmered, roasted, fried, grilled, toasted, blistered, and heated. Each of these words has a different connotation and usage, but all are useful when describing the sound of high heat. 'Crackled' and 'seared' bring to mind the sound of meat cooking on a hot grill, while 'simmered' and 'roasted' suggests the sound of vegetables and dishes cooking in an oven. Overall, using synonyms for 'sizzed' can improve the quality of your writing by providing different nuances and more vivid descriptions.