preliterate vs nonliterate

preliterate and nonliterate both are adjectives.

Word	Noun	Adjective	Verb	Adverb
preliterate	No	Yes	No	No
nonliterate	No	Yes	No	No

As adjectives, preliterate and nonliterate are synonyms defined as:

preliterate and nonliterate: used of a society that has not developed writing

preliterate (adjective)	nonliterate (adjective)
not yet having acquired the ability to read and write	used of a society that has not developed writing
used of a society that has not developed writing