The term "Gray mare" refers to a female horse with a gray or white coat color. Synonyms for "gray mare" include terms such as "gray horse," "white horse," and "dapple gray." Other animal-related synonyms for "gray mare" include "silver mare," "ash mare," and "pale mare." It is important to note that while these terms may be used interchangeably, they do not necessarily mean the exact same thing. Different shades of gray or white may warrant different terms, and other factors such as breed and gender may also come into play.