intangibleness vs impalpability

intangibleness and impalpability both are nouns.

Word	Noun	Adjective	Verb	Adverb
intangibleness	Yes	No	No	No
impalpability	Yes	No	No	No

As nouns, intangibleness and impalpability are synonyms defined as:

intangibleness and impalpability: the quality of being intangible and not perceptible by touch

Other synonyms of intangibleness include intangibility.

intangibleness (noun)	impalpability (noun)
the quality of being intangible and not perceptible by touch	the quality of being intangible and not perceptible by touch
	Ungraspability by or inapprehensibility to the mind.