noxious vs pernicious

noxious and pernicious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
noxious	No	Yes	No	No
pernicious	No	Yes	No	No

noxious (adjective)	pernicious (adjective)
injurious to physical or mental health	working or spreading in a hidden and usually injurious way
	exceedingly harmful