unoccupied vs untenanted

unoccupied and untenanted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unoccupied	No	Yes	No	No
untenanted	No	Yes	No	No

As adjectives, unoccupied and untenanted are synonyms defined as:

unoccupied (adjective)	untenanted (adjective)
not held or filled or in use	not leased to or occupied by a tenant
not seized and controlled
not leased to or occupied by a tenant