The word "newborn kitten" can be replaced with a variety of synonyms to bring more variety to your writing. Some alternatives include "babe cat," "infant feline," "young kitty," "neonatal puss," "tiny tom," "novice tabby," "juvenile moggy," "fresh kitty," and "nascent pussycat." Each of these words brings a slightly different meaning or connotation to your writing, whether you want to emphasize the cute and cuddly nature of a kitten or highlight its inexperience and need for care. Experiment with these synonyms in your writing to bring new life to your descriptions of adorable feline babies.