preferential vs favourable

preferential and favourable both are adjectives.

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

preferential (adjective)	favourable (adjective)
manifesting partiality	(of winds or weather) tending to promote or facilitate
	encouraging or approving or pleasing
	giving an advantage
	presaging or likely to bring good luck or a good outcome