As nouns the difference between nationalism and ultranationalism. is that nationalism is patriotism; the idea of supporting one's country and culture while ultranationalism is extreme nationalism, the belief in the superiority of one's nation and of the paramount importance of advancing it.
Nationalism is an ideology that emphasizes loyalty, devotion, or allegiance to a nation or nation-state and holds that such obligations outweigh other individual or group interests.
While
Ultranationalism is "extreme nationalism that promotes the interest of one state or people above all others", or simply "extreme devotion to one's own nation".
