ignorant vs unknowing

ignorant is not a noun while unknowing is a noun.

Word	Noun	Adjective	Verb	Adverb
ignorant	No	Yes	No	No
unknowing	Yes	Yes	No	No

As adjectives, ignorant and unknowing are synonyms defined as:

ignorant and unknowing: unaware because of a lack of relevant information or knowledge

Other synonyms of ignorant include unknowledgeable, unwitting.

ignorant (noun)	unknowing (noun)
	ignorance (especially of orthodox beliefs)

ignorant (adjective)	unknowing (adjective)
unaware because of a lack of relevant information or knowledge	unaware because of a lack of relevant information or knowledge
uneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field
uneducated in general; lacking knowledge or sophistication