catechist vs instructor

catechist and instructor both are nouns.

Word	Noun	Adjective	Verb	Adverb
catechist	Yes	No	No	No
instructor	Yes	No	No	No

As nouns, instructor is a hypernym of catechist; that is, instructor is a word with a broader meaning than catechist:

catechist: one who instructs catechumens in preparation for baptism (especially one using a catechism)
instructor: a person whose occupation is teaching

Other hypernyms of catechist include teacher.

catechist (noun)	instructor (noun)
one who instructs catechumens in preparation for baptism (especially one using a catechism)	a person whose occupation is teaching