Cockier is a word that describes an individual who is overly confident or arrogant. However, there are several synonyms for this word that can be used to convey similar meanings. Arrogant, conceited, haughty, egotistical, and boastful are some of the synonyms for cockier that can be used in place of it. These words describe someone who is overly confident, self-centered, and believes they are superior to others. Other related synonyms include overconfident, presumptuous, and pretentious. Using these synonyms can help express a similar meaning without being repetitive and also expand one's vocabulary.