When it comes to describing large enclosures for animals or birds, there are several synonyms for the term "big cages". Some of the most common ones include aviaries, pens, enclosures, habitats, coops, and kennels. Aviaries refer to large cages specifically designed for birds, while pens and enclosures are more general terms for any kind of enclosure for animals or birds. Habitats usually indicate more natural and spacious enclosures, whereas coops refer to enclosures for chickens or other poultry. Kennels are typically used for dogs or other domesticated animals. Regardless of the term used, it is important to ensure that the enclosure provides adequate space and comfort for the animals or birds inside.