| Cunningham Hall Council | Academic & Science |
| Chestnut Hill College's | Academic & Science |
| Chlorinated HydroCarbon(s) | Academic & Science |
| Clark Honors College | Academic & Science |
| Chavakachcheri Hindu College | Academic & Science |
| Cornwall Hill College | Academic & Science |
| Calvert Hall College | Academic & Science |
| Christchurch | Airport Code |
| Community Health Club | Associations & Organizations |
| Colonial Hockey Conference | Associations & Organizations |
| Croatian Helsinki Committee | Associations & Organizations |
| Cargo Handling Cooperative | Business |
| CHina Consultant | Business |
| Charles Street | Business |
| Charter Hall Group | Business |
| China Hydroelectric Corporation | Business |
| Commonwealth Health Corporation | Business |
| Charter Municipal Marketing Acceptance Company (de-listed) | Business |
| Certified Health Coach | Certifications |
| Chlorinated Hydrocarbon | Chemistry |
| Community Housing Coalition | Community |
| Confederate High Command | Community |
| Cops Helping Cops | Community |
| Church Hill Crew | Community |
| Community Health Charities | Community |
| Children's Hope Chest | Community |
| Catholic Health Care | Community |
| City Harvest Church | Community |
| Capital Hockey Conference | Community |
| Catholic Heritage Curricula's | Community |
| Catholic Heritage Curricula | Community |
| Connecticut Hockey Conference | Community |
| Community Health Choice | Community |
| Community Health Care | Community |
| Community Health Centre | Community |
| Cerner Health Conference | Community |
| Communication for Healthy Communities | Community |
| Classical Hollywood Cinema | Community |
| Christian Help Center | Community |
| Community Health Council | Community |
| Cultural Heritage Committee | Community |
| Christian Homeschool Connection | Community |
| Custom Hero Chaos | Computing |
| Counter Hack Challenge | Computing |
| Christchurch Hackers Conference | Computing |
| California Hardware Company | Computing |
| Chestnut Hill College | Educational Institute |
| Crafton Hills College | Educational Institute |
| Christian Heritage College | Educational Institute |
| Component Handling and Cleaning | Electronics |
| Center for Hearing and Communication | General |
| Compounded Hydroxyprogesterone Caproate | General |
| Castrol Haugg Cup | General |
| Car Hire Club | General |
| Canadian Hummer Club | General |
| Colorado Hummer Club | General |
| Car History Check | General |
| Crv Hrv Community | General |
| Chassis Container | General |
| Champ Custom | General |
| Coconut Husk Chips | General |
| Chicago Cardinals | General |
| Congressional Hispanic Caucus | General |
| Cuban Heritage Collection | General |
| Clathrin heavy chain | General |
| Chelli Harms Collection | General |
| Home Center | General |
| Complex Hardware Configuration | General |
| Home Centers | General |
| Clean Hands Coil | General |
| Critical Hit Chance | General |
| Cleveland Humanities Collaborative | General |
| Constrained Horn Clauses | General |
| Call Handling Centre | Governmental |
| Community Health Councils | Governmental |
| Children's Health Council | Governmental |
| Canadian Hurricane Centre | Governmental |
| Council for Homeopathic Certification | Governmental |
| CHANCHAI | Indian Railway Station |
| Couldn't Honestly Care | Internet |
| Centre For Health Care | Medical |
| Consumer HealthCare | Medical |
| Chronic Hepatitis C | Medical |
| Child Health Clinic | Medical |
| Community Health Center | Medical |
| Community Health Council (Wales) | Medical |
| Continuing Health Care | Medical |
| Continuous Home Care | Medical |
| Combined Hormonal Contraceptive | Medical |
| Certified in Healthcare Compliance | Medical |
| Community Health Centers | Medical |
| Certified Healthcare Constructor | Medical |
| Cattell–Horn–Carroll | Medical |
| Centro Hospitalar de Coimbra | Medical |
| Community Hospital Corporation | Medical |
| Commune Health Center | Medical |
| Clay Humus Complex | Medical |
| Canadian Holding Company | Messaging |
| Chaplain Corps | Military and Defence |
| Christchurch, New Zealand | Regional |
| Canadian Health Coalition | Regional |
| Chicago Cubs | Sports |
| Canadian Heavyweight Champion | Sports |
| Christchurch Airport | Transport & Travel |
