predestinarian vs necessitarian

predestinarian and necessitarian both are nouns.

Word	Noun	Adjective	Verb	Adverb
predestinarian	Yes	Yes	No	No
necessitarian	Yes	No	No	No

As nouns, necessitarian is a hypernym of predestinarian; that is, necessitarian is a word with a broader meaning than predestinarian:

predestinarian: anyone who submits to the belief that they are powerless to change their destiny
necessitarian: someone who does not believe the doctrine of free will

predestinarian (noun)	necessitarian (noun)
anyone who submits to the belief that they are powerless to change their destiny	someone who does not believe the doctrine of free will

predestinarian (adjective)	necessitarian (adjective)
of or relating to predestination; holding the doctrine of predestination