We don't have synonyms for nation-states yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are nation-state, nation states and nation state.
(n) :
(more generally, proscribed) Any independent political state; a country.
(n) :
(politics) A political entity (a state) associated with a common national identity (historically, culturally, or ethnically; as with a nation) and a sovereign territorial unit.
(n) :
(more generally, proscribed) Any independent political state; a country.
(n) :
(politics) A political entity (a state) associated with a common national identity (historically, culturally, or ethnically; as with a nation) and a sovereign territorial unit.