"Swanker" is a colloquial term used to describe someone who is boastful and excessively proud of themselves. However, there are various other words that could be used in place of "swanker" depending on the context and tone desired. Some synonyms include "braggart," "show-off," "egotist," "cocky," "conceited," "arrogant," "vain," "pompous," and "self-important." Each of these words conveys an aspect of someone who is overly confident and self-promoting. It is always wise to choose your words carefully when describing someone or their behavior, as different synonyms may have different connotations and emotions attached to them.