Cock-a-doodle-doo is often associated with the sound made by roosters. However, there are several other synonyms that can be used instead. One of the most popular is "cock-a-doodle-dos", which is similar but has a slightly different ring to it. Other synonyms include crow, cackle, cluck, squawk, and chirp. Each of these words has a slightly different connotation and can be used to describe different types of bird sounds. For example, cackles are often associated with hens, while chirps are typically made by smaller birds. Regardless of which synonym you choose, they all evoke the sounds of nature and can add an extra layer of description to your writing.