Swaggeringly is an adverb used to describe someone who walks in a proud or arrogant manner. Synonyms for swaggeringly include struttingly, confidently, arrogantly, haughtily and pompously. Other possible words that can be used are dandily, showily, ostentatiously, boldly and jauntily. These words convey the sense of someone who is walking with confidence and an air of superiority. However, it is important to use these words with caution, as they can also carry negative connotations. It is worth considering the context and tone in which these words are used, to ensure that they convey the intended meaning.