residency vs abidance

residency and abidance both are nouns.

Word	Noun	Adjective	Verb	Adverb
residency	Yes	No	No	No
abidance	Yes	No	No	No

As nouns, residency and abidance are synonyms defined as:

Other synonyms of residency include residence.

residency (noun)	abidance (noun)
the act of dwelling in a place	the act of abiding (enduring without yielding)
the position of physician who is receiving special training in a hospital (usually after completing an internship)	the act of dwelling in a place
	acting according to certain accepted standards