- HyTime
- Hyacinthe Klosé
- Hyacinthella
- Hyacinthoides
- Hyacinthus
- Hyadaphis foeniculi
- Hyaena hyaena
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- Hyalis
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- Hyalosaurus
- Hyalosaurus koellikeri
- Hyaloseris
- Hyalosperma
- Hyannis (Nebraska)
- Hyataella
- Hyattsville
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- Hybanthus
- Hybla Valley
- Hyblaeidae
- Hybochilus
- Hybognathus
- Hybognathus amarus
- Hybomys
- Hybomys badius
- Hybomys eisentrauti
- Hybomys lunaris
- Hybomys planifrons
- Hybomys trivirgatus
- Hybomys univittatus
- Hybosema
- Hybrid Theory
- Hybrid Theory (EP)
- Hybrid Theory EP (Underground v1.0)
- Hybridella
- Hydaburg
- Hydatella
- Hydatellaceae
- Hyde
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- Hyde Park (Chicago)
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- Hydekel de Freitas Lima
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- Hydetown
- Hydnocarpus
- Hydnophytum
- Hydnoraceae
- Hydra
- HydraCore
- Hydra (satélite)
- Hydra (xadrez)
- Hydraenidae
- Hydralisk
- Hydrangea
- Hydrangea macrophylla
- Hydrangeaceae
- Hydranthelium
- Hydrastis
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- Hydro (Oklahoma)
- Hydrobates castro
- Hydrobates pelagicus
- Hydrobatidae
- Hydrobia
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- Hydrobryopsis
- Hydrobryum
- Hydrocera
- Hydrochaeris hydrochaeris
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- Hydrocharitaceae
- Hydrochloa
- Hydrochoerus hydrochaeris
- Hydrochorea
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- Hydrocleys
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- Hydrodynastes melanogigas
- Hydrogaster
- Hydrogen Energy
- Hydrogenophilaceae
- Hydroidea
- Hydrolaetare dantasi
- Hydrolaetare schmidti
- Hydrolagus
- Hydrolagus africanus
- Hydrolagus alberti
- Hydrolagus barbouri
- Hydrolagus lemures
- Hydrolagus macrophthalmus
- Hydrolagus mitsukurii
- Hydrolagus ogilbyi
- Hydrolagus purpurescens
- Hydroleaceae
- Hydromantes
- Hydromantes brunus
- Hydromantes platycephalus
- Hydromeli
- Hydromestus
- Hydromys
- Hydromys chrysogastes
- Hydromys habbema
- Hydromys hussoni
- Hydromys neobritannicus
- Hydromys shawmayeri
- Hydropectis
- Hydrophiinae
- Hydrophilus
- Hydrophobia
- Hydrophylax
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- Hydropsalis
- Hydropsalis brasiliana
- Hydropsalis climacocerca
- Hydrorchis
- Hydrostachyaceae
- Hydrostachys
- Hydrotarsus
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- Hydrothauma
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- Hydrurga
- Hydrurga leptonyx
- Hydrus
- Hyds
- Hyenville
- Hyeong
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- Hyeronima
- Hyeronymus Monetarius
- Hyetornis pluvialis
- Hygea
- Hyginus
- Hygrochilus
- Hygrochloa
- Hygromia
- Hygromia golasi
- Hygrophila
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- Hyksos
- Hyla arborea
- Hyla cinerea
- Hyla versicolor
- Hylacola
- Hylaeamys megacephalus
- Hylaeamys oniscus
- Hylaeanthe
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- Hylaeonympha magoi
- Hylaeosaurus
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- Hylaeothemis fruhstorferi
- Hylandia
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- Hyldon
- Hylebates
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- Hyline
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- Hylobatidae
- Hylocarpa
- Hylocarpa heterocarpa
- Hylocereus
- Hylocharis
- Hylocharis chrysura
- Hylocharis eliciae
- Hylocharis grayi
- Hylocharis pyropygia
- Hylochoerus
- Hylochoerus meinertzhageni
- Hylocitrea bonensis
- Hylocryptus
- Hylocryptus erythrocephalus
- Hylocryptus rectirostris
- Hyloctistes
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- Hylodendron
- Hylodes
- Hylodes amnicola
- Hylodes asper
- Hylodes babax
- Hylodes charadranaetes
- Hylodes dactylocinus
- Hylodes glaber
- Hylodes heyeri
- Hylodes lateristrigatus
- Hylodes magalhaesi
- Hylodes meridionalis
- Hylodes mertensi
- Hylodes nasus
- Hylodes ornatus
- Hylodes otavioi
- Hylodes perplicatus
- Hylodes phyllodes
- Hylodes regius
- Hylodes sazimai
- Hylodes uai
- Hylodes vanzolinii
- Hylomecon
- Hylomyinae
- Hylomyscus
- Hylomyscus denniae
- Hylomyscus grandis
- Hylomyscus parvus
- Hylomyscus stella
- Hylonomus
- Hylopetes
- Hylopezus
- Hylopezus auricularis
- Hylopezus dives
- Hylopezus fulviventris
- Hylopezus nattereri
- Hylopezus ochroleucus
- Hylopezus perspicillatus
- Hylophila
- Hylophilus
- Hylophilus olivaceus
- Hylophilus semibrunneus
- Hylophilus thoracicus
- Hylophorbus nigrinus
- Hylophorbus picoides
- Hylophorbus richardsi
- Hylophorbus rufescens
- Hylophorbus sextus
- Hylophorbus tetraphonus
- Hylophorbus wondiwoi
- Hylophylax
- Hylophylax naevioides
- Hylophylax naevius
- Hylophylax punctulatus
- Hylorchilus
- Hylorchilus navai
- Hylorchilus sumichrasti
- Hylotelephium
- Hyloxalus chlorocraspedus
- Hylte (comuna)
- Hymenachne
- Hymenachne amplexicaulis
- Hymenaea
- Hymenaea courbaril
- Hymenaea protera
- Hymenaea torrei
- Hymenaea verrucosa
- Hymenaios
- Hymenandra
- Hymenanthera
- Hymenocallis
- Hymenocardia
- Hymenocarpos
- Hymenocephalus
- Hymenochaeta
- Hymenochirus boulengeri
- Hymenochirus curtipes
- Hymenochirus feae
- Hymenochlaena
- Hymenoclea
- Hymenocnemis
- Hymenocoleus
- Hymenocrater
- Hymenodictyon
- Hymenogyne
- Hymenolepis
- Hymenolepis nana
- Hymenolepsis
- Hymenolepsis nana
- Hymenolesis nana
- Hymenolobium
- Hymenolobus
- Hymenolophus
- Hymenonema
- Hymenopappus
- Hymenops
- Hymenops perspicillatus
- Hymenoptera
- Hymenopyramis
- Hymenorchis
- Hymenostegia
- Hymenostegia aubrevillei
- Hymenostegia bakeriana
- Hymenostegia gracilipes
- Hymenostegia talbotii
- Hymenostemma
- Hymenothecium
- Hymenothrix
- Hymenoxys
- Hymera (Indiana)
- Hymne Chérifien
- Hymne monégasque
- Hymnen an die Nacht
- Hymni i Flamurit
- Hymno Patriótico
- Hymno da Carta
- Hymns to the Silence
- Hyndman
- Hynobiidae
- Hynobius abei
- Hynobius amjiensis
- Hynobius arisanensis
- Hynobius boulengeri
- Hynobius chinensis
- Hynobius dunni
- Hynobius formosanus
- Hynobius guabangshanensis
- Hynobius hidamontanus
- Hynobius katoi
- Hynobius kimurae
- Hynobius leechii