pernicious vs noxious

pernicious and noxious both are adjectives.

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

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