Whether or not nationalism is an ideology is a question that can be illuminated by a study of its conceptual structure. Core and adjacent concepts of nationalism are examined within the context of liberal, conservative and fascist ideologies, contexts that respectively encourage particular ideational paths within nationalist argument, while discouraging others. Employing a morphological analysis of ideological configurations, it is argued that various nationalisms may appear as distinct thin-centred ideologies, but are more readily understood as embellishments of, and sustainers of, the features of their host ideologies.