permissibility vs permissible

permissibility is a noun but permissible is not a noun.

Word	Noun	Adjective	Verb	Adverb
permissibility	Yes	No	No	No
permissible	No	Yes	No	No

permissibility (noun)	permissible (noun)
admissibility as a consequence of being permitted

permissibility (adjective)	permissible (adjective)
	that may be permitted especially as according to rule
	that may be accepted or conceded