| Hackers | Hackers (film) | Hackerspace |
| Hackett, Arkansas | Hackett, Wisconsin | Hackety Hack |
| Hackney carriage | Hacktivism | Hacrobia |
| Hadar, Nebraska | Hadas | Hadım Ali Pasha |
| HadCRUT | Haddada, Morocco | Haddam, Connecticut |
| Haddam, Kansas | Hadean | Hadena |
| Hadhabani | Hadi Aghily | Hadi Al-Amiri |
| Hadi al-Bahra | Hadi al-Mahdi | Hadi al-Modarresi |
| Hadi Beyglu | Hadi Sabzavari | Hadi Soua'an Al-Somaily |
| Hadia Tajik | Hadiabad, Fasa | Hadiabad, Golestan |
| Hadiabad, Kerman | Hadim Suleiman Pasha | Hadith |
| Hadith studies | Hadith terminology | Hadizatou Mani |
| Hadj Abderrahmane | Hadj Bouguèche | Hadj El Anka |
| Hadji Ali | Hadley Township, Michigan | Hadley, Massachusetts |
| Hadley, Minnesota | Hadley, New York | Hadoop |
| Hadrian's Villa | Hadrian's Wall | Hadrianus Relandus |
| Hadron | Hadropithecus | Hadrosauridae |
| Hadrumetum | Hady Khashaba | Haegen |
| Haemantheae | Haemanthus | Haemanthus albiflos |
| Haemanthus amarylloides | Haemanthus avasmontanus | Haemanthus barkerae |
| Haemanthus canaliculatus | Haemanthus carneus | Haemanthus coccineus |
| Haemanthus crispus | Haemanthus dasyphyllus | Haemanthus deformis |
| Haemanthus graniticus | Haemanthus humilis | Haemanthus lanceifolius |
| Haemanthus montanus | Haemanthus namaquensis | Haemanthus nortieri |
| Haemanthus pauculifolius | Haemanthus pubescens | Haemanthus pumilio |
| Haemanthus sanguineus | Haemanthus sessiliflorus | Haemanthus tristis |
| Haemanthus unifoliatus | Haemaphysalis | Haemaphysalis longicornis |
| Haemaphysalis spinigera | Haematin | Haematopidae |
| Haematopoidea | Haematopoiesis | Haematopus |
| Haematopus ater | Haematopus bachmani | Haematopus finschi |
| Haematopus fuliginosus | Haematopus leucopodus | Haematopus longirostris |
| Haematopus ostralegus | Haematopus palliatus | Haematopus unicolor |
| Haematoxylum | Haematozoa | Haemochromatosis |
| Haemoconia | Haemoglobin (hb) | Haemolacria |
| Haemophilia | Haemophilus | Haemophilus aegyptius |
| Haemophilus aphrophilus | Haemophilus ducreyi | Haemophilus felis |
| Haemophilus haemolyticus | Haemophilus influenzae | Haemophilus influenzae type B vaccine |
| Haemophilus parainfluenzae | Haemophilus paraphrophilus | Haemophilus pittmaniae |
| Haemophilus segnis | Haemophilus vaginalis | Haemorrhagic disease of the newborn |
| Haemospororida | Hafar Al-Batin Domestic Airport | Hafez |
| Hafez al assad | Hafez al-Assad | Hafez Kasseb |
| Hafez Makhlouf | Hafiz (Quran) | Hafiz Osman |
| Hafiz Sabri Koçi | Hafiz-i Abru | Hafizullah Amin |
| Hafnium | Hafnium carbide | Hafnium dioxide |
| Hafnium tetrachloride | Hafnium(IV) carbide | Hafnium(IV) chloride |
| Hafnium(IV) oxide | Hafsia Herzi | Haft Cheshmeh, Semnan |
| Haft Khvani | Haft Piran | Haft Tanan |
| Haft Tepe | Haftadar | Hafthohlladung |
| Hagaman, New York | Hagan, Georgia | Hagar (Bible) |
| Hagar Township, Michigan | Hagen (Randen) | Hagen Kleinert |
| Hagen, Moselle | Hagen–Poiseuille equation | Hagerman |
| Hagerman, New Mexico | Hagerstown, Indiana | Hagerstown, Maryland |
| Hagfish | Haggagovic | Hagia Sophia |
| Hagiography | Hagiology | Haglere |
| Haglund's syndrome | Hague Conventions of 1899 and 1907 | Hague Hijacking Convention |
| Hague, New York | Hague, North Dakota | Haguenau |
| Hahira, Georgia | Hahnen | Hai nan |
| Haidar Abdel-Shafi | Haidar Abdul-Amir | Haidar Abdul-Jabar |
| Haidar Abdul-Razzaq | Haidar Aboodi | Haidar Abu Bakr al-Attas |
| Haidar Al-Shaïbani | Haidar Obeid Jassim | Haidar Raad |
| Haider (film) | Haider al-Abadi | Haider Mahmoud |
| Haier | Haifa | Haifa Abdelhak |
| Haifa bus 37 suicide bombing | Haifa Street | Haifa Wehbe |
| Haifa Zangana | Haig Acterian | Haight Township, Michigan |
| Haigler, Nebraska | Haikara-san ga Tōru | Haikou Meilan International Airport |
| Haiku | Haiku (operating system) | Hail |
| Hail, Caesar! | Hailar Dongshan Airport | Haile Gebrselassie |
| Haile Selassie | Hailee Steinfeld | Hailemariam Desalegn |
| Hailey Anne Nelson | Haileyville, Oklahoma | Haillicourt |
| Haim Jelin | Haim Katz | Haim Landau |
| Haim Ramon | Haim-Moshe Shapira | Hainan |
| Hainan Airlines | Haines, Alaska | Haines, Oregon |
| Hainesville, Illinois | Hair | Hair casts |
| Hair dryer | Hair follicle | Hair follicle nevus |
| Hair keratin | Hair removal | Hairball |
| Hairdresser | Hairspray (2007 film) | Hairstyle |
| Hairuddin Omar | Haisnes | Haitham al-Maleh |
| Haitham al-Yemeni | Haitham Kadhim | Haitham Mustafa |
| Haitham Simreen | Haitham Zein | Haiti |
| Haitian Creole language | Haitian Creole Wikipedia | Haitian gourde |
| Haitian Revolution | Haitian Vodou | Haizum |
| Haj Amin al-Husseini | Hajaz Akram | Hajazi |
| Hajdú-Bihar | Hajime Hosogai | Hajj |
| Hajj Ahmad Kandi | Hajj Ali Hiki | Hajj passport |
| Hajj Yusef, Kerman | HAJJAR | Hajji Abbas Kandi |
| Hajji Ali Beyg Kandi | Hajji Ali Beyk | Hajji Balkhan |
| Hajji Dela | Hajji Kalateh | Hajji Qareh |
| Hajji Qelich | Hajji Qushan | Hajji Tappeh |
| Hajji Taqi | Hajjiabad Beshaq | Hajjiabad Darvish |
| Hajjiabad, Abyek | Hajjiabad, Aliabad | Hajjiabad, Aligudarz |
| Hajjiabad, Amlash | Hajjiabad, Amol | Hajjiabad, Arak |
| Hajjiabad, Arsanjan | Hajjiabad, Fariman | Hajjiabad, Mardehek |
| Hajjiabad, Nargesan | Hajjiabad, Zaz va Mahru | Hajjiabad-e Mir Hoseyni |
| Hajjiabad-e Zarrin | Hajjilar Qaleh | Hakan Şükür |
| Hakan Ünsal | Hakan Çalhanoğlu | Hakan Balta |
| Hakan Yakin | Hakea | Hakea dactyloides |
| Hakea gibbosa | Hakea salicifolia | Hakea sericea |
| Hakea suaveolens | Hakeem Olajuwon | Hakeem Shaker |
| Haketia | Hakim Ben Hammouda | Hakim ibn Hizam |
| Hakim Noury | Hakim Qeshlaqi | Hakim Tafer |
