rubricate vs rubric

rubricate is not a noun while rubric is a noun.

Word	Noun	Adjective	Verb	Adverb
rubricate	No	No	Yes	No
rubric	Yes	No	Yes	No

rubricate (noun)	rubric (noun)
	category name
	a title or heading that is printed in red or in a special type
	an explanation or definition of an obscure word in a text
	an authoritative rule of conduct or procedure
	directions for the conduct of Christian church services (often printed in red in a prayer book)
	a heading that names a statute or legislative bill; may give a brief summary of the matters it deals with

rubricate (verb)	rubric (verb)
sign with a mark instead of a name	adorn with ruby red color
decorate (manuscripts) with letters painted red
furnish with rubrics or regulate by rubrics
place in the church calendar as a red-letter day honoring a saint