pestiferous vs vexatious

pestiferous and vexatious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
pestiferous	No	Yes	No	No
vexatious	No	Yes	No	No

As adjectives, pestiferous and vexatious are synonyms defined as:

Other synonyms of pestiferous include annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, plaguey, plaguy, teasing, vexing.

pestiferous (adjective)	vexatious (adjective)
causing irritation or annoyance	causing irritation or annoyance
likely to spread and cause an epidemic disease
tending to corrupt or pervert
contaminated with infecting organisms