Breeding, a term that refers to the act of raising, producing, or propagating a particular species or organism, can be replaced by various synonyms that depict the same meaning. Some synonyms for breeding include reproduction, multiplying, procreation, generation, propagation, and breeding-in. Each of these words embodies the concept of creating something new and sustaining the continuity of a species' lineage. While breeding primarily refers to animal or plant breeding, it can also be used colloquially when referring to child-rearing. Regardless of the context, the synonyms for breeding serve as a way to describe the essential act of growth and expansion in a living organism.