oecumenism vs ecumenism

oecumenism and ecumenism both are nouns.

Word	Noun	Adjective	Verb	Adverb
oecumenism	Yes	No	No	No
ecumenism	Yes	No	No	No

As nouns, oecumenism and ecumenism are synonyms defined as:

oecumenism and ecumenism: a movement promoting union between religions (especially between Christian churches)

oecumenism (noun)	ecumenism (noun)
a movement promoting union between religions (especially between Christian churches)	(Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity
	a movement promoting union between religions (especially between Christian churches)