consequence vs consequential

consequence is a noun but consequential is not a noun.

Word	Noun	Adjective	Verb	Adverb
consequence	Yes	No	No	No
consequential	No	Yes	No	No

consequence (noun)	consequential (noun)
having important effects or influence
the outcome of an event especially as relative to an individual
a phenomenon that follows and is caused by some previous phenomenon

consequence (adjective)	consequential (adjective)
	having important issues or results