Nouns

(n)illiterate, illiterate person, nonreadera person unable to read

Adjectives

(a)illiteratenot able to read or write
(s)ignorant, illiterateuneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field“she is ignorant of quantum mechanics”, “he is musically illiterate”
(a)illiteratelacking culture, especially in language and literature