| HWC | Halo World Championship 
| Others |
| HWC | Hamburger Woolen Company
| Others |
| HWC | Hamza Without a Carrier
| Others |
| HWC | Hancock Whitney Corporation
| Others |
| HWC | Handle With Care
| Others |
| HWC | Hannam Wagle Cline
| Others |
| HWC | Hardware Commissioning
| Others |
| HWC | Hardware Controller
| Others |
| HWC | Hardware Counter
| Others |
| HWC | Hardware Cursor
| Others |
| HWC | Harold Washington College
| Others |
| HWC | Hawkeye Wrestling Club
| Others |
| HWC | Hazardous Waste Co
| Others |
| HWC | Hazardous Waste Combustor
| Others |
| HWC | Health and Welfare Canada
| Others |
| HWC | Health and Wellness Channel
| Others |
| HWC | Health Wellness Center
| Others |
| HWC | Heavy Weapons Corps
| Others |
| HWC | Heavy Whipped Cream
| Others |
| HWC | Heavy Whipping Cream
| Others |
| HWC | Hello World Communications
| Others |
| HWC | Herbal Wellness Center
| Others |
| HWC | Highway Code
| Others |
| HWC | Hispanic Womens Corporation
| Others |
| HWC | Hobart Walk in Cooler
| Others |
| HWC | Holocaust Warning Center
| Others |
| HWC | Home Works Corporation
| Others |
| HWC | Homeless World Cup
| Others |
| HWC | Hot Water Converter
| Others |
| HWC | Hot Weird Chick
| Others |
| HWC | Hot Wheel Car
| Others |
| HWC | Hot Wheels Collectors
| Others |
| HWC | Hot White Come
| Others |
| HWC | Hot White Cum
| Others |
| HWC | Houston Wire and Cable
| Others |
| HWC | Houston Worship Centre
| Others |
| HWC | How We Communicate
| Others |
| HWC | Human Wildlife Conflict
| Others |
| HWC | Humanities and Western
| Others |
| HWC | Humanities and Western Civilization
| Others |
| HWC | Hurricane Warning Center
| Others |
| HWC | Hybrid Wrestling Coalition
| Others |