conspiracy vs conspire

conspiracy is a noun but conspire is not a noun.

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

conspiracy (noun)	conspire (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

conspiracy (verb)	conspire (verb)
	engage in plotting or enter into a conspiracy, swear together
	act in unison or agreement and in secret towards a deceitful or illegal purpose