| hydrosphère | hydrosphere |
| hydrostatique | hydrostatics |
| hydrothérapie | hydrotherapy |
| Hydroxide | Hydroxide |
| Hydroxyanisole butylé | Butylated hydroxyanisole |
| Hydroxyapatite | Hydroxylapatite |
| hydroxyde | hydroxide |
| Hydroxyde de baryum | Barium hydroxide |
| Hydroxyde de lithium | Lithium hydroxide |
| Hydroxyde de sodium | Sodium hydroxide |
| Hydroxylamine | Hydroxylamine |
| Hydroxylation | Hydroxylation |
| Hydroxyle | Hydroxide |
| Hydroxytoluène butylé | Butylated hydroxytoluene |
| Hydrozoa | Hydrozoa |
| hydroélectrique | hydroelectric |
| Hyesan | Hyesan |
| Hygie | Hygieia |
| Hygiene | Hygiene |
| Hygin | Pope Hyginus |
| Hygin le gromatique | Hyginus Gromaticus |
| hygiène | hygiene |
| hygiène alimentaire | food hygiene |
| Hygiène bucco-dentaire | Oral hygiene |
| hygiène de l'environnement | environmental health |
| Hygiène des mains | Hand washing |
| hygiène du travail | occupational health |
| Hygiène publique | Hygiene |
| hygiénique | hygienic |
| Hygrocybe | Hygrocybe |
| hygroma | bursitis |
| Hygrométrie | Humidity |
| Hygrophila | Hygrophila |
| Hygrophoropsidaceae | Hygrophoropsidaceae |
| HYIP | High-yield investment program |
| Hyksôs | Hyksos |
| Hyla | Hyla |
| Hyla cinerea | American green tree frog |
| Hyla gratiosa | Hyla gratiosa |
| Hyla meridionalis | Hyla meridionalis |
| Hyla squirella | Hyla squirella |
| Hylands Park | Hylands Park |
| Hylas | Hylas |
| Hyllos | Hyllus |
| Hylobius abietis | Hylobius abietis |
| Hylocereus | Hylocereus |
| Hylomyinae | Gymnure |
| Hylomys | Hylomys |
| Hylopetes | Hylopetes |
| Hylotelephium telephium | Hylotelephium telephium |
| Hylémorphisme | Hylomorphism |
| hymen | hymen |
| Hymenochirus | African dwarf frog |
| Hymenolepis nana | Hymenolepiasis |
| Hymenoptera | Hymenoptera |
| hymenoptère | hymenopteran |
| Hymiskvida | Hymiskviða |
| hymne | canticle |
| Hymne alsacien | Elsässisches Fahnenlied |
| Hymne chérifien | Hymne Chérifien |
| Hymne de Gibraltar | Gibraltar Anthem |
| Hymne de la République socialiste soviétique kazakhe | Anthem of the Kazakh SSR |
| Hymne européen | European anthem |
| hymne funèbre | dirge |
| Hymne galicien | Os Pinos |
| Hymne monégasque | Hymne Monégasque |
| hymne national | national anthem |
| Hymne national argentin | Argentine National Anthem |
| Hymne national de la Colombie | National Anthem of Colombia |
| Hymne national de la Mongolie | National Anthem of Mongolia |
| Hymne national de la Russie | National Anthem of Russia |
| Hymne national du Chili | Himno Nacional de Chile |
| Hymne national du Salvador | National Anthem of El Salvador |
| Hymne national mexicain | Himno Nacional Mexicano |
| Hymne national sud-africain | National anthem of South Africa |
| Hymne olympique | Olympic Anthem |
| Hymne à Aton | Great Hymn to the Aten |
| Hymne à la beauté | Hymn to Beauty |
| Hymne à la Liberté | Hymn to Liberty |
| Hymnes homériques | Homeric Hymns |
| Hymni i Flamurit | Himni i Flamurit |
| Hyménomycètes | Hymenomycete |
| Hyménotomie | Hymenotomy |
