| hydrotherapy | hydrotherapie |
| Hydrothermal circulation | Hydrothermale circulatie |
| Hydrothermal vent | Hydrothermale bron |
| hydroxide | hydroxyde |
| Hydroxides | Hydroxylgroep |
| Hydrozincite | Hydrozinkiet |
| Hydrozoa | Hydroidpoliepen |
| Hydruret | Hydride |
| Hydrus | Kleine Waterslang |
| Hyemoschus aquaticus | Waterdwerghert |
| hyena | hyena |
| Hygeia | Hygiea |
| Hygelac | Hygelac |
| Hygieia | Hygieia |
| hygiene | hygiëne |
| hygienic | hygiënisch |
| Hyginus | Hyginus |
| Hygrocybe conica | Zwartwordende wasplaat |
| Hygrogen Sulfide | Diwaterstofsulfide |
| Hygrophoraceae | Hygrophoraceae |
| Hygrophoropsidaceae | Hygrophoropsidaceae |
| Hygrophoropsis aurantiaca | Valse hanenkam |
| Hygroscopicity | Hygroscopisch |
| Hyksos | Hyksos |
| Hyla | Hyla |
| Hyla gratiosa | Blaffende boomkikker |
| Hyla meridionalis | Mediterrane boomkikker |
| Hyles euphorbiae | Wolfsmelkpijlstaart |
| Hyles gallii | Walstropijlstaart |
| Hyllestad | Hyllestad |
| Hylobates | Hylobates |
| Hylobatidae | Gibbons |
| Hylotelephium telephium | Hemelsleutel |
| Hylte Municipality | Hylte |
| hymen | maagdenvlies |
| Hymenaios | Hymenaeus |
| Hymenochaetales | Hymenochaetales |
| Hymenomycete | Basidiomycetes |
| Hymenomycotina | Agaricomycetidae |
| Hymenophore | Hymenophore |
| Hymenoptera | Hymenoptera |
| Hymer | Hymir |
| Hymettus | Imittos |
| Hymir | Hymir |
| Hymiskviða | Hymiskviða |
| hymn | kantiek |
| Hymn of the Soviet Union | Gimn Sovjetskogo Sojoeza |
| Hymn to Freedom | Imnos pros tin Eleftherian |
| Hymn to Liberty | Ymnos eis tin Elephterian |
| hymnal | gezangboek |
| hymnary | gezangboek |
| hymnbook | gezangboek |
| Hymne Chérifien | Hymne Cherifien |
| Hymne Monégasque | Hymne Monégasque |
| Hyndluljóð | Hyndluljóð |
| Hyoglossus | Musculus hyoglossus |
| Hyoscyamus | Hyoscyamus |
| Hypanis | Koeban |
| Hypatia of Alexandria | Hypatia |
| Hyper-threading | Hyper-Threading |
| hyperactive | overactief |
