irridentism vs philosophy

irridentism and philosophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
irridentism	Yes	No	No	No
philosophy	Yes	No	No	No

As nouns, philosophy is a hypernym of irridentism; that is, philosophy is a word with a broader meaning than irridentism:

irridentism: the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related
philosophy: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of irridentism include doctrine, ism, philosophical system, school of thought.

irridentism (noun)	philosophy (noun)
the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related	the rational investigation of questions about existence and knowledge and ethics
	a belief (or system of beliefs) accepted as authoritative by some group or school
	any personal belief about how to live or how to deal with a situation