recusant vs recuse

recusant is a noun but recuse is not a noun.

Word	Noun	Adjective	Verb	Adverb
recusant	Yes	Yes	No	No
recuse	No	No	Yes	No

recusant (noun)	recuse (noun)
someone who refuses to conform to established standards of conduct

recusant (adjective)	recuse (adjective)
refusing to submit to authority
(of Catholics) refusing to attend services of the Church of England

recusant (verb)	recuse (verb)
	challenge or except to a judge as being incompetent or interested, in canon and civil law
	disqualify oneself (as a judge) in a particular case