worldwide vs oecumenical

worldwide and oecumenical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
worldwide	No	Yes	No	No
oecumenical	No	Yes	No	No

As adjectives, worldwide and oecumenical are synonyms defined as:

Other synonyms of worldwide include cosmopolitan, ecumenical, general, universal, world-wide.

worldwide (adjective)	oecumenical (adjective)
of worldwide scope or applicability	of worldwide scope or applicability
spanning or extending throughout the entire world	concerned with promoting unity among churches or religions
involving the entire earth; not limited or provincial in scope