- Wall Materials, Belfast
- Warehousing & Storage, Belfast - Warehouse Services
- Waste & Refuse Services & Sites, Belfast
- Water Companies, Belfast
- Water Transportation, Except Passenger, Belfast
- Waterfront Restaurants, Belfast
- Website Design, Management & Maintenance Services, Belfast
- Wedding & Bridal Services, Belfast
- Wedding Reception Venues & Locations, Belfast - Wedding Halls
- Wheel Alignment, Frame & Axle Service & Repair, Belfast
- Window & Blind Cleaning, Belfast
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- Window & Door - Installation & Repair, Belfast - Install, Repair & Replace
- Window Blinds, Shades & Window Treatments and Coverings, Belfast - Roller & Roman Shades - Wood, Metal & Vertical Blinds
- Windows, Belfast - Single & Double Hung, Casement, Sliding, Glass Block, Basement Windows & More
- Windows and Doors, Belfast - Wholesale, Manufacturers & Suppliers
- Wines - Wholesale, Belfast
- Wines, Brandy & Brandy Spirits, Belfast
- Wireless & Cellular Communications Equipment & Supplies, Belfast
- Women s Clothing Stores, Belfast - Clothes & Accessories
- Women's Fashion Accessories, Belfast - Handbags, Wallets, Scarves, Belts, Necklace, Bracelets, Earrings and more
- Womens Organizations, Belfast
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