irridentism vs irredentism

irridentism and irredentism both are nouns.

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

As nouns, irridentism and irredentism are synonyms defined as:

irridentism and irredentism: the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related

irridentism (noun)	irredentism (noun)
the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related	the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related