The term 'not occupied' can be described by several words, all of which have different lengths. The first is 'VACANT, ' which has 6 letters and means 'unoccupied or not currently used.' The second is 'FREE, ' which has 4 letters and means 'not under the control of another; able to act or be used as one wishes.' The third is 'IDLE, ' which also has 4 letters and means 'not employed or busy; inactive.' The fourth is 'EMPTY, ' which has 5 letters and means 'containing nothing; not filled or occupied.' Finally, the last is 'UNEMPLOYED, ' which has 10 letters and means 'not having a job; without work.' All of these words describe the same concept: not being occupied.