prosperous vs favourable

prosperous and favourable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
prosperous	No	Yes	No	No
favourable	No	Yes	No	No

As adjectives, prosperous and favourable are synonyms defined as:

prosperous and favourable: presaging or likely to bring good luck or a good outcome

Other synonyms of prosperous include favorable, golden, lucky.

prosperous (adjective)	favourable (adjective)
marked by peace and prosperity	(of winds or weather) tending to promote or facilitate
presaging or likely to bring good luck or a good outcome	encouraging or approving or pleasing
in fortunate circumstances financially; moderately rich	giving an advantage
very lively and profitable	presaging or likely to bring good luck or a good outcome