preliterate vs illiterate

preliterate is not a noun while illiterate is a noun.

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

preliterate (noun)	illiterate (noun)
	a person unable to read

preliterate (adjective)	illiterate (adjective)
not yet having acquired the ability to read and write	not able to read or write
used of a society that has not developed writing	lacking culture, especially in language and literature
	uneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field