ripen vs mature

ripen is not an adjective while mature is an adjective.

Word	Noun	Adjective	Verb	Adverb
ripen	No	No	Yes	No
mature	No	Yes	Yes	No

As verbs, mature is a hypernym of ripen; that is, mature is a word with a broader meaning than ripen:

Other hypernyms of ripen include grow, maturate.

As verbs, ripen and mature are synonyms defined as:

ripen (adjective)	mature (adjective)
	having reached full natural growth or development
	characteristic of maturity
	(of birds) having developed feathers or plumage; often used in combination
	fully developed or matured and ready to be eaten or used
	fully considered and perfected

ripen (verb)	mature (verb)
grow ripe	cause to ripen and discharge pus
cause to ripen or develop fully	develop and reach maturity; undergo maturation
	grow old or older
	become due for repayment
	cause to ripen or develop fully
	develop and work out fully in one's mind