Thalassocracy, a lesser-known term, refers to a political system where control and dominance are exerted through naval power. Though infrequently encountered, there are a few alternate words that convey similar meaning. One such synonym is "sea empire", denoting a maritime hegemony that exercises authority over vast oceanic territories. Another term that could be employed is "naval dominion", which encapsulates the notion of a powerful state exerting control primarily through its naval forces. Lastly, the phrase "maritime sovereignty" can be used when referring to countries or nations that possess extensive sea power and exploit it for political dominance. Overall, these synonymous expressions aptly describe the essence of thalassocracy in various contexts.