17-letter words containing sio
- vacant possession — ownership of an unoccupied house or property, any previous owner or tenant having departed
- vehicle emissions — substances emitted from a vehicle as a result of internal combustion
- x image extension — (XIE) Extensions to the X protocol to handle images.
- year of confusion — (in ancient Rome) the year of 445 days preceding the introduction, in 46 b.c., of the Julian calendar: lengthened to compensate for the cumulative errors of the Roman calendar.