pestilent vs pestilential

pestilent and pestilential both are adjectives.

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

As adjectives, pestilent and pestilential are synonyms defined as:

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

Other synonyms of pestilent include pestiferous, plaguey.

pestilent (adjective)	pestilential (adjective)
likely to spread and cause an epidemic disease	likely to spread and cause an epidemic disease
exceedingly harmful