occupancy vs moving in

occupancy and moving in both are nouns.

Word	Noun	Adjective	Verb	Adverb
occupancy	Yes	No	No	No
moving in	Yes	No	No	No

As nouns, occupancy and moving in are synonyms defined as:

occupancy and moving in: the act of occupying or taking possession of a building

Other synonyms of occupancy include occupation.

occupancy (noun)	moving in (noun)
an act of being a tenant or occupant	the act of occupying or taking possession of a building
the act of occupying or taking possession of a building