Barn-door fowl is a phrase that can be used to refer to a variety of domesticated birds raised in agriculture and specifically those raised for their meat or eggs. Some synonyms for this phrase might include the more specific terms "chicken" or "poultry," as well as terms like "fowl," "rooster," "hen," or "turkey." Depending on the context, other possible synonyms could include bird breeds such as "Cornish game hen," "Capons," or "broilers." Overall, there are many different ways to refer to these common farm animals, depending on their specific species, breed, and intended use.