ecumenical vs oecumenic

ecumenical and oecumenic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ecumenical	No	Yes	No	No
oecumenic	No	Yes	No	No

As adjectives, ecumenical and oecumenic are synonyms defined as:

ecumenical and oecumenic: concerned with promoting unity among churches or religions

Other synonyms of ecumenical include ecumenic, oecumenical.

ecumenical (adjective)	oecumenic (adjective)
of worldwide scope or applicability	concerned with promoting unity among churches or religions
concerned with promoting unity among churches or religions