| WAA | The World Atlatl Association, Incorporated 
| Others |
| WAA | Wabash Motor Freight Tariff Association
| Others |
| WAA | Waffen Amt And
| Others |
| WAA | Wales, Alaska USA
| Others |
| WAA | Walk Across America
| Others |
| WAA | War Assets Administration
| Others |
| WAA | Warden's Association of America
| Others |
| WAA | Wardens' Association of America
| Others |
| WAA | Waris, Papua New Guinea (Seismograph station code)
| Others |
| WAA | Warm Air Advection
| Others |
| WAA | Wartime Aircraft Activity
| Others |
| WAA | Washington Apartment Association
| Others |
| WAA | Washington Area Astronomers
| Others |
| WAA | Washington Art Association
| Others |
| WAA | Washington Association of Accountants
| Others |
| WAA | Water Apportionment Accord
| Others |
| WAA | Water Availability Analysis
| Others |
| WAA | Water-Augmented Air jet
| Others |
| WAA | Wavelet Analysis and its Applications conference
| Others |
| WAA | We Architech Anonymous
| Others |
| WAA | We're All Awesome
| Others |
| WAA | Weak Affirmative Action
| Others |
| WAA | Web Analytics Association
| Others |
| WAA | Web and App Activity
| Others |
| WAA | Web Application Architecture
| Others |
| WAA | Web Assisted Assessment
| Others |
| WAA | Week Arranged in Advance
| Others |
| WAA | Welded Aluminum Alloy
| Others |
| WAA | Werkgroep Artsen Advocaten
| Others |
| WAA | West Australian Agency
| Others |
| WAA | Westchester Amateur Astronomers
| Others |
| WAA | Western Amateur Astronomers
| Others |
| WAA | Western Arts Alliance
| Others |
| WAA | Western Awning Association
| Others |
| WAA | Westtown Alumni Association
| Others |
| WAA | Wheatland Athletic Association
| Others |
| WAA | When Artists Attack
| Others |
| WAA | Wide Angle Abuse
| Others |
| WAA | Wide Aperture Array
| Others |
| WAA | Wien Air Alaska
| Others |
| WAA | Wilmington Apartment Association
| Others |
| WAA | Windows Administrator Authentication
| Others |
| WAA | Winning An Argument
| Others |
| WAA | Winnipeg Airports Authority
| Others |
| WAA | Wins Above Average
| Others |
| WAA | Winthrop Alumni Association
| Others |
| WAA | Wireless Advertising Association
| Others |
| WAA | Wireless Airport Association
| Others |
| WAA | Wireless Android Auto
| Others |
| WAA | Wisconsin Alternate Assessment
| Others |
| WAA | Wisconsin Alumni Association
| Others |
| WAA | Wisconsin Apartment Association
| Others |
| WAA | Wisconsin Aquaculture Association
| Others |
| WAA | Wisconsin Arborist Association
| Others |
| WAA | Wisconsin Arborist Association's
| Others |
| WAA | Wisconsin Arborists Association
| Others |
| WAA | Wisconsin Archery Alliance
| Others |
| WAA | Wisconsin Association of Accountants
| Others |
| WAA | Wisconsin Auctioneers Association
| Others |
| WAA | Wisconsin Automotive Aftermarket
| Others |
| WAA | Wolves Are Awesome
| Others |
| WAA | Women in Aeronautics and Astronautics
| Others |
| WAA | Women's Action Alliance
| Others |
| WAA | Woodbury Athletic Association
| Others |
| WAA | Work Assignment Area
| Others |
| WAA | Worker Adjustment Assistance
| Others |
| WAA | Working Age Agency
| Others |
| WAA | World Aluminum Abstracts
| Others |
| WAA | World American Airlift
| Others |
| WAA | World Apheresis Association
| Others |
| WAA | World Artists Association
| Others |
| WAA | World Assembly on Ageing
| Others |
| WAA | World Athletic Association
| Others |
| WAA | World of Art and Antiques
| Others |
| WAA | Wreaths Across America
| Others |
| WAA | Writing for Academic Applications
| Others |