applicability vs relevancy

applicability and relevancy both are nouns.

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

As nouns, relevancy is a hypernym of applicability; that is, relevancy is a word with a broader meaning than applicability:

applicability: relevance by virtue of being applicable to the matter at hand
relevancy: the relation of something to the matter at hand

Other hypernyms of applicability include relevance.

applicability (noun)	relevancy (noun)
relevance by virtue of being applicable to the matter at hand	the relation of something to the matter at hand