Fertilized eggs are a crucial component in animal reproduction. However, there are various other synonyms for fertilized eggs. Some of them include zygote, ovum, embryo, and germ cells. Zygote refers to the fusion of two gamete cells, often used in reference to developing embryos. The ovum is also another term for an egg cell, usually referring to unfertilized eggs. Embryo, on the other hand, is generally used to describe young developing organisms in the early stages of their life. The germ cells are the reproductive cells of animals and plants, which can develop into a new organism when fertilized. Overall, fertilized eggs are essential for the survival and continuation of species, and their synonyms are equally important in understanding their development.