| hustle and bustle | ajetreo |
| hustler | prostituta |
| hut | cabaña |
| hutch | conejera |
| Hutia | Capromyidae |
| Hutt | Chatti |
| Huttwil | Huttwil |
| Hutu | Hutu |
| Huvadhu Atoll | Atolón Huvadhoo |
| Huygens | Huygens |
| Huygens probe | Sonda Huygens |
| Huzziya I | Huzzia I |
| Huánuco | Huánuco |
| Huánuco Province | Provincia de Huánuco |
| Huánuco Region | Departamento de Huánuco |
| Huáscar | Huáscar |
| Huétor Tájar | Huétor-Tájar |
| Huíla | Huila |
| Huế | Hué |
| Huỳnh Công Út | Huynh Cong Ut |
| Hvergelmir | Hvergelmir |
| Hversu Noregr byggðist | Hversu Noregr byggdist |
| Hwa Rang Do | Hwarangdo |
| Hwair | Hwair |
| Hwang Woo-Suk | Hwang Woo-Suk |
| hyacinth | jacinto |
| Hyacinth Macaw | Anodorhynchus hyacinthinus |
| Hyacinthaceae | Hyacinthaceae |
| Hyacinthe Rigaud | Hyacinthe Rigaud |
| Hyacinthia | Jacintias |
| Hyacinthus | Jacinto |
| Hyacinthus orientalis | Jacinto |
| Hyades | Híades |
| hyaena | hiena |
| Hyaenas | Hyaenidae |
| Hyaenodon | Hyaenodon |
| Hyakujuu Sentai Gaoranger | Hyakujuu Sentai Gaoranger |
| Hyaluronan | Ácido hialurónico |
| Hyarmendacil I | Ciryaher |
| hybrid | cruzado |
| Hybrid bicycle | Bicicleta híbrida |
| Hybrid electric vehicle | Vehículo híbrido |
| Hybrid Fibre Coaxial | Hybrid Fibre Coaxial |
| Hybrid fibre-coaxial | Hybrid Fibre Coaxial |
| Hybrid intelligent system | Sistemas híbridos inteligentes |
| hybridisation | hibridación |
| hybridization | hibridación |
| Hydarnes | Hidarnes |
| Hydatius | Hidacio |
| Hyde | HYDE |
| Hyde Park | Hyde Park |
| Hyderabad | Hyderabad |
| Hyderabad State | Hyderabad |
| Hydra | Hydra |
| Hydra Ichi | Ichi |
| Hydra viridis | Hydra viridis |
| Hydranencephaly | Hidranencefalia |
| hydrangea | hortensia |
| Hydrangea macrophylla | Hydrangea macrophylla |
| Hydrangeaceae | Hydrangeaceae |
| hydrant | boca de agua |
| hydrate | hidrato |
| Hydration reaction | Reacción de hidratación |
| hydraulic | hidráulico |
| hydraulic construction | construcciones hidráulicas |
| Hydraulic cylinder | Cilindro hidráulico |
| Hydraulic despotism | Despotismo hidráulico |
| hydraulic engineering | ingeniería hidráulica |
| Hydraulic machinery | Máquina hidráulica |
| Hydraulic mining | Minería hidráulica |
| Hydraulic turbine | Turbina de agua |
| hydraulics | hidráulica |
| Hydria | Hidria |
| Hydrid | Hidruro |
| Hydro energy | Energía hidráulica |
| Hydro power | Energía hidráulica |
| Hydro turbine | Turbina de agua |
| Hydro-electric power | Energía hidráulica |
| Hydro-Man | Hydro-Man |
| Hydro-power | Energía hidráulica |
| hydrobiology | hidrobiología |
| Hydroboration-oxidation reaction | Hidroboración |
| hydrocarbon | hidrocarburo |
| hydrocarbon storage tank | tanque de almacenamiento de hidrocarburo |
| Hydrocele testis | Hidrocele |
| Hydrocharitaceae | Hydrocharitaceae |
| hydrochloric acid | acido clorhídrico |
| Hydrocodone | Hidrocodona |
| Hydrocotyle | Hydrocotyle |
| hydroculture | agricultura de riego |
| hydrodynamics | hidrodinámica |
| hydroelectric | hidroeléctrico |
| hydroelectric energy | energía hidroeléctrica |
| Hydroelectric plant | Central hidroeléctrica |
| Hydroelectric power | Central hidroeléctrica |
| hydroelectric power plant | central hidroeléctrica |
| Hydroelectricity | Central hidroeléctrica |
| hydrofoil | aerodeslizador |
| hydrogen | hidrógeno |
| Hydrogen bombs | Bomba de hidrógeno |
| Hydrogen bond | Enlace por puente de hidrógeno |
| Hydrogen burning | Fusión del hidrógeno |
| Hydrogen cyanide | Ácido cianhídrico |
| Hydrogen economy | Economía del hidrógeno |
| Hydrogen halide | Hidrácido |
| Hydrogen line | Línea del hidrógeno |
| hydrogen peroxide | agua oxigenada |
| Hydrogen spectrum | Espectro del hidrógeno |
| Hydrogen sulfide | Sulfuro de hidrógeno |
| hydrogen sulphide | sulfuro de hidrógeno |
| Hydrogen technologies | Tecnologías del hidrógeno |
| Hydrogen telluride | Teluriuro de hidrógeno |
| Hydrogen vehicle | Vehículo de hidrógeno |
| Hydrogen-like atom | Átomo hidrogenoide |
| Hydrogenosome | Hidrogenosoma |
| hydrogeology | hidrogeología |
| hydrographic basin | cuenca hidrográfica |
| hydrographic network | red hidrográfica |
| hydrography | hidrografía |
| Hydroida | Hydroida |
| Hydrolase | Hidrolasa |
| Hydrolisis | Hidrólisis |
| hydrologic balance | equilibrio hidrológico |
| hydrologic cycle | ciclo hidrológico |
| hydrologic disaster | desastres hidrológicos |
| hydrologic flow | caudal |
| Hydrologic year | Año hidrológico |
| Hydrological year | Año hidrológico |
| hydrology | hidrología |
| hydrolysis | hidrolisis |
| Hydromagnetic wave | Onda hidromagnética |
| Hydromagnetics | Hidromagnetismo |
| Hydrometallurgy | Hidrometalurgia |
| hydrometeorology | hidrometeorología |
| hydrometer | hidrómetro |
| hydrometry | hidrometría |
| Hydronium | Hidronio |
| hydrophilic | hidrofílico |
| Hydrophilidae | Hydrophilidae |
| hydrophobia | hidrofobia |
| hydrophobic | hidrófobo |
| Hydrophyllaceae | Hydrophyllaceae |
| hydroplane | hidroavión |
| Hydropneumatic suspension | Suspensión hidroneumática |
| hydroponics | hidroponía |
| Hydropower station | Central hidroeléctrica |
| Hydrosphera | Hidrosfera |
| hydrosphere | hidrosfera |
| Hydrostatic equilibrium | Equilibrio hidrostático |
| Hydrostatic skeleton | Hidroesqueleto |
| hydrostatics | hidrostática |
| hydrotherapy | hidroterapia |
| Hydrothermal synthesis | Cristalografía |
| Hydrothermal vent | Respiradero hidrotermal |
| hydroxide | hidróxido |
