openness vs receptiveness

openness and receptiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
openness	Yes	No	No	No
receptiveness	Yes	No	No	No

As nouns, openness and receptiveness are synonyms defined as:

openness and receptiveness: willingness or readiness to receive (especially impressions or ideas)

Other synonyms of openness include receptivity.

openness (noun)	receptiveness (noun)
characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive	willingness or readiness to receive (especially impressions or ideas)
willingness or readiness to receive (especially impressions or ideas)
without obstructions to passage or view