Tower

noun

1. A very tall iron-framed structure, usually painted red and white, on which microwave, radio, satellite, or other communication antennas are installed; mast.
2. A similarly framed structure with a platform or enclosed area on top, used as a lookout for spotting fires, plane crashes, fugitives, etc.
3. A water tower.
4. A control tower.
5. Any very tall building or structure; skyscraper.