grievous vs of import

grievous and of import both are adjectives.

Word	Noun	Adjective	Verb	Adverb
grievous	No	Yes	No	No
of import	No	Yes	No	No

grievous (adjective)	of import (adjective)
causing fear or anxiety by threatening great harm	of great significance or value
shockingly brutal or cruel
of great gravity or crucial import; requiring serious thought
causing or marked by grief or anguish