"Cock a doodle do" is a classic onomatopoeic phrase that represents the crowing of a rooster. However, there are numerous variations of this phrase that can be used to describe the same sound. Some of the synonyms for "cock a doodle do" include "cock-a-doodle-doo," "cock-a-doodle-doodle," "doodle-doo," and "cock-a-doodle-oh." Each of these phrases captures the essence of the rooster's cackle and can be used interchangeably with "cock a doodle do." Whether you are writing poetry, children's books, or simply trying to describe the sound of a rooster, it's always helpful to have a few alternatives for this classic phrase on hand.