palpability vs palpable

palpability is a noun but palpable is not a noun.

Word	Noun	Adjective	Verb	Adverb
palpability	Yes	No	No	No
palpable	No	Yes	No	No

palpability (noun)	palpable (noun)
the quality of being perceivable by touch

palpability (adjective)	palpable (adjective)
	capable of being perceived; especially capable of being handled or touched or felt
	so intense as to be almost touched or felt
	clearly revealed to the mind or the senses or judgment
	(medicine) can be felt by palpation