imagination vs imaginativeness

imagination and imaginativeness both are nouns.

Word	Noun	Adjective	Verb	Adverb
imagination	Yes	No	No	No
imaginativeness	Yes	No	No	No

As nouns, imagination and imaginativeness are synonyms defined as:

imagination and imaginativeness: the formation of a mental image of something that is not perceived as real and is not present to the senses

Other synonyms of imagination include vision.

imagination (noun)	imaginativeness (noun)
the formation of a mental image of something that is not perceived as real and is not present to the senses	the formation of a mental image of something that is not perceived as real and is not present to the senses
the ability to form mental images of things or events
the ability to deal resourcefully with unusual problems