sort by Rank | Alpha
| Possible Meanings | Rank |
| University of South Carolina in Columbia | **** |
| US Chambers of Commerce | **** |
| United States Conference of Catholic | **** |
| U S Composting Council | **** |
| U S Chamber of Commerce | **** |
| U S China Commission | **** |
| U S Chambers of Commerce | **** |
| Ultimate Street Car Challenge | **** |
| U S Christian Commission | **** |
| United States Cross Country | **** |
| United States Christian Commission | **** |
| U S Catholic Conference | **** |
| United States Cellular Corporation | *** |
| Unitarian Service Committee of Canada | *** |
| United States Catholic Charities | *** |
| US Conference of Catholic | *** |
| United States Consensus Council | *** |
| United States Collegiate Championship | *** |
| United States Cartridge Company | *** |
| Upper South Carolina Conference | *** |
| United States Cochrane Center | *** |
| ungual squamous cell carcinoma | ** |
| unresectable squamous cell carcinoma | ** |
| Unified and Specified Combatant Commands | ** |
| University Staff Consultative Committee | ** |
| Unseen Since the Camp | ** |
| United Student Christian Council | ** |
| University Student Conduct Committee | ** |
| United States Container Corporation | ** |
| United States Camaro Club | ** |
| Unilever Supply Chain Company | ** |
| United States Colored Cavalry | ** |
| United States Crystal Corp | ** |
| Upper Savannah Care Consortium | ** |
| U S Controlled Corporations | ** |
| University of Southern California Consortium | ** |
| Unmanned Systems Common Control | ** |
| Unmanned Systems Capabilities Conference | ** |
| United States Commercial Company | ** |
| U S Computer Connection | ** |
| United States Chambers of Commerce | ** |
| United States Corrections Corporation | ** |
| United States Catholic Conferences | ** |
| University Student Counselling Centre | ** |
| U S Cancellation Club | ** |
| U S Cosmetics Corporation | ** |
| United States Cellular Company | ** |
| United States Chemical Corporation | ** |
| Union Sportive Curial Cambrai | ** |
| United States Compost Council | ** |
| Utah Soil Conservation Commission | ** |
| Ultimate Sport Compact Car | * |
| United States Corp of Cadets | * |
| U S Community Chaplaincy | * |
| Urban Suburban Clergy Conference | * |
| Ultra Small Combined Cycle | * |
| Union of Seaside Cities and Communes | * |
| United States Claims Court | * |
| United States Commercial Center | * |
| Universal Screening in Child Care | * |
| U S Commercial Company | * |
| United Spiritual Communities of Christ | * |
| United States Canada and Caribbean | * |
| University Skills and Capabilities Curriculum | * |
| Uncle Sam Coal Company | * |
| United States Can Company | * |
| United States Chess Center | * |
| United States Coal and Coke | * |
| United States Coal Corporation | * |
| University of San Carlos Cebu | * |