Vacant (Word): This means having no fixtures, furniture, or inhabitants; completely unoccupied or empty. (e.g., a vacant lot or a vacant seat).
Empty (Synonym): This is the direct equivalent, meaning containing nothing or not filled.
Full (Antonym): This is the opposite of vacant; containing as much or as many as is possible.
Brutal (Irrelevant): This means savagely violent or harsh.
Popular (Irrelevant): This means liked, admired, or enjoyed by many people.