important vs notable

important is not a noun while notable is a noun.

Word	Noun	Adjective	Verb	Adverb
important	No	Yes	No	No
notable	Yes	Yes	No	No

important (noun)	notable (noun)
	a celebrity who is an inspiration to others

important (adjective)	notable (adjective)
of great significance or value	widely known and esteemed
of extreme importance; vital to the resolution of a crisis	worthy of attention
important in effect or meaning
having or suggesting a consciousness of high position
having authority or ascendancy or influence