A brood mare is a female horse specifically utilized for breeding. Synonyms for brood mare include dam, mare, mare in foal, pregnant mare, and stud mare. While the term "brood mare" is commonly used in the horse breeding industry, it can be considered outdated and potentially offensive to some due to its use of the word "brood" which can have negative connotations. The use of alternative synonyms can provide a more inclusive and respectful approach when discussing female horses who are bred for their offspring.