pestiferous vs pestilent

pestiferous and pestilent both are adjectives.

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

As adjectives, pestiferous and pestilent are synonyms defined as:

pestiferous and pestilent: likely to spread and cause an epidemic disease

Other synonyms of pestiferous include pestilential, plaguey.

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