| Hutthurm | Hutthurm |
| Huttwil | Huttwil |
| Hutu | Hutu |
| HUU | HUU |
| Huub Stevens | Huub Stevens |
| Huvadhu Atoll | Atollo Huvadu |
| Huygens | Huygens |
| Huzita-Hatori axioms | Assiomi di Huzita-Hatori |
| Huánuco | Huánuco |
| Huánuco Province | Huánuco |
| Huánuco Region | Huánuco |
| Huáscar | Huáscar |
| Huétor Tájar | Huétor Tájar |
| Huíla | Huíla |
| Huế | Hué |
| HV | HV |
| HVAC | HVAC |
| Hvaler | Hvaler |
| Hvalsø | Hvalsø |
| Hvannadalshnúkur | Hvannadalshnjúkur |
| Hvar | Isola di Lesina |
| Hveragerði | Hveragerði |
| Hvidebæk | Hvidebæk |
| Hvidovre | Hvidovre |
| Hvis lyset tar oss | Hvis Lyset Tar Oss |
| Hvorslev municipality | Hvorslev |
| Hvozdnica | Hvozdnica |
| HW | HW |
| Hwarang | Hwarang |
| Hwaseong Fortress | Fortezza di Hwaseong |
| Hwicce | Hwicce |
| HY | HY |
| hyacinth | giacinto |
| Hyacinth Macaw | Anodorhynchus hyacinthinus |
| Hyacintha Mariscotti | Santa Giacinta Marescotti |
| Hyacinthe Klosé | Hyacinthe Eléonore Klosé |
| Hyacinthe Rigaud | Hyacinthe Rigaud |
| Hyacinthe Thiandoum | Giacinto Thiandoum |
| Hyacinthus | Giacinto |
| Hyacinthus orientalis | Hyacinthus orientalis |
| Hyades | Iadi |
| Hyaenas | Hyaenidae |
| Hyaenodon | Hyaenodon |
| Hyakunin Isshu | Hyakunin isshu |
| Hyaluronan | Acido ialuronico |
| Hyarmendacil I | Hyarmendacil I |
| hybrid | ibrido |
| Hybrid electric vehicle | Veicolo ibrido |
| hybridisation | ibridizzazione |
| hybridization | ibridazione |
| Hydatius | Idazio |
| Hyde Park | Hyde Park |
| Hyderabad | Hyderabad |
| Hyderabad State | Hyderabad |
| Hydnum repandum | Hydnum repandum |
| Hydnum rufescens | Hydnum rufescens |
| Hydra | Idra |
| Hydra Ichi | Aspides |
| Hydra viridis | Chlorohydra viridissima |
| hydrangea | ortensia |
| Hydrangea macrophylla | Hydrangea |
| hydrant | idrante |
| hydrate | idrato |
| hydrating | idratante |
| hydraulic | idraulico |
| hydraulic construction | costruzione idraulica |
| Hydraulic cylinder | Martinello |
| Hydraulic diameter | Diametro equivalente |
| hydraulic engineer | idraulico |
| hydraulic engineering | ingegneria idraulica |
| hydraulics | idraulica |
| Hydreliox | Hydreliox |
| Hydria | Idria |
| Hydrid | Idruro |
| Hydro-Man | Hydro-Man |
