applicability vs pertinency

applicability and pertinency both are nouns.

Word	Noun	Adjective	Verb	Adverb
applicability	Yes	No	No	No
pertinency	Yes	No	No	No

As nouns, applicability and pertinency are synonyms defined as:

applicability and pertinency: relevance by virtue of being applicable to the matter at hand

Other synonyms of applicability include pertinence.

applicability (noun)	pertinency (noun)
relevance by virtue of being applicable to the matter at hand	relevance by virtue of being applicable to the matter at hand