Omniparous, which means capable of producing offspring repeatedly, has a variety of synonyms. One common synonym is multiparous, which is often used in medical contexts to describe a woman who has given birth to more than one child. Other synonyms include polytocous, fecund, fruitful, prolific, and reproductive. These words all describe the ability to produce multiple offspring. Some other related words include fertile, prolificacy, and prolificness, which indicate a high degree of reproductive potential. No matter what synonym you choose, the concept of being able to produce many offspring is fundamental to the definition of omniparous.