important vs grievous

important and grievous both are adjectives.

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

important (adjective)	grievous (adjective)
of great significance or value	causing fear or anxiety by threatening great harm
of extreme importance; vital to the resolution of a crisis	shockingly brutal or cruel
important in effect or meaning	of great gravity or crucial import; requiring serious thought
having or suggesting a consciousness of high position	causing or marked by grief or anguish
having authority or ascendancy or influence