noun
Republic of the Sudan
Official name of the country Sudan. Used in formal and geographical contexts.
スーダン共和国の首都はハルツームです。
The capital of the Republic of the Sudan is Khartoum.
スーダン is the common short name for Sudan, while スーダン共和国 is the formal full name.
From English 'Sudan' plus 共和国 (republic).