decreed vs ordained

decreed and ordained both are adjectives.

Word	Noun	Adjective	Verb	Adverb
decreed	No	Yes	No	No
ordained	No	Yes	No	No

As adjectives, decreed and ordained are synonyms defined as:

decreed and ordained: fixed or established especially by order or command

Other synonyms of decreed include appointed, prescribed.

decreed (adjective)	ordained (adjective)
fixed or established especially by order or command	invested with ministerial or priestly functions
	fixed or established especially by order or command