conspiratorial vs conspiracy

conspiratorial is not a noun while conspiracy is a noun.

Word	Noun	Adjective	Verb	Adverb
conspiratorial	No	Yes	No	No
conspiracy	Yes	No	No	No

conspiratorial (noun)	conspiracy (noun)
	a plot to carry out some harmful or illegal act (especially a political plot)
	a secret agreement between two or more people to perform an unlawful act
	a group of conspirators banded together to achieve some harmful or illegal purpose

conspiratorial (adjective)	conspiracy (adjective)
relating to or characteristic of conspiracy or conspirators