palmy vs prosperous

palmy and prosperous both are adjectives.

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

As adjectives, palmy and prosperous are synonyms defined as:

Other synonyms of palmy include booming, burgeoning, flourishing, prospering, roaring, thriving.

palmy (adjective)	prosperous (adjective)
very lively and profitable	marked by peace and prosperity
	presaging or likely to bring good luck or a good outcome
	in fortunate circumstances financially; moderately rich
	very lively and profitable