When it comes to describing an arrogant government, there are numerous synonyms that one can use to convey the same meaning. Some of the words that can be used include overbearing, conceited, egotistical, haughty, pompous, high-handed, imperious, presumptuous, overconfident, and overweening. All these words suggest that the government in question is behaving in a manner that suggests they have an exaggerated sense of their own importance or abilities. When used appropriately, synonyms can add richness and depth to descriptions, making them more effective in communicating intended meanings. So, depending on the context, one can choose a synonym that will best convey the intended meaning of an arrogant government.