Synonyms for Occupied (same or very similar meaning)
WordNet sense 1 ((of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line)):
busy, engagedWordNet sense 2 (resided in; having tenants):
tenantedWordNet sense 3 (having inhabitants; lived in):
inhabitedFrom the ODE community, based on WordNetadd/edit