residency vs lodging

residency and lodging both are nouns.

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

As nouns, lodging is a hyponym of residency; that is, lodging is a word with a more specific, narrower meaning than residency:

Other hyponyms of residency include occupancy, tenancy.

residency (noun)	lodging (noun)
the act of dwelling in a place	the act of lodging
the position of physician who is receiving special training in a hospital (usually after completing an internship)	structures collectively in which people are housed
	the state or quality of being lodged or fixed even temporarily