pestilential vs pestiferous

pestilential and pestiferous both are adjectives.

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

As adjectives, pestilential and pestiferous are synonyms defined as:

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

Other synonyms of pestilential include pestilent, plaguey.

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