catechetic vs catechism

catechetic is not a noun while catechism is a noun.

Word	Noun	Adjective	Verb	Adverb
catechetic	No	Yes	No	No
catechism	Yes	No	No	No

catechetic (noun)	catechism (noun)
	an elementary book summarizing the principles of a Christian religion; written as questions and answers
	a series of questions put to an individual (such as a political candidate) to elicit their views

catechetic (adjective)	catechism (adjective)
of or relating to or resembling a rigorous catechism
of or relating to or involving catechesis