Imaginary creature and Imaginativeness

Imaginary creature noun - A creature of the imagination; a person that exists only in legends or myths or fiction.

Imaginativeness and imaginary creature are semantically related. In some cases you can use "Imaginativeness" instead a noun phrase "Imaginary creature".

Imaginativeness noun - The ability to form mental images of things that either are not physically present or have never been conceived or created by others.

Imaginary creature and imaginativeness are semantically related. Sometimes you can replace phrase "Imaginary creature" with "Imaginativeness", this terms are similar.