We found one dictionary that defines the word underdeveloped nations:

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1. Underdeveloped nations: Encyclopedia

▸ Words similar to underdeveloped nations ▸ Usage examples for underdeveloped nations ▸ Idioms related to underdeveloped nations ▸ Wikipedia articles (New!) ▸ Words that often appear near underdeveloped nations ▸ Rhymes of underdeveloped nations ▸ Invented words related to underdeveloped nations