receptivity vs openness

receptivity and openness both are nouns.

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

As nouns, receptivity and openness are synonyms defined as:

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

Other synonyms of receptivity include receptiveness.

receptivity (noun)	openness (noun)
willingness or readiness to receive (especially impressions or ideas)	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)
	without obstructions to passage or view