China 
Africa 
- Homogeneous differential equations
- Homogeneous function
- Homogeneous graph
- Homogeneous spaces
- Homogenized
- Homography
- Homojunction
- Homoleptic
- Homological algebra
- Homologous
- Homologous chromosomes
- Homologous recombination
- Homologous series
- Homologous temperature
- Homologues
- Homology
- Homology modeling
- Homolysis
- Homomorphic encryption
- Homomorphisms
- Homonuclear
- Homopolysaccharide
- Homoserine kinase
- Homothety
- Homotopy
- Homotopy analysis method
- Homotopy groups
- Homovanillic acid
- Homozygous
- Honda
- Honeycomb
- Honeycomb structures
- Honeypot
- Honing
- Honokiol
- Hook effect
- Hookah
- Hooke's Law
- Hooks
- Hoop stress
- Hopane
- Hopanoids
- Hopcalite
- Hopeite
- Hopf bifurcation
- Hopf maximum principle
- Hopfield networks
- Hoppers
- Horizons
- Horizontal drilling
- Horizontal gene transfer
- Horizontal line test
- Horizontal position
- Hormesis
- Hormonal therapy
- Hormone receptors
- Hormone therapy
- Hormone-sensitive lipase
- Hormones
- Horn
- Horn angle
- Horn antenna
- Horn clauses
- Hornblende
- Hornblendite
- Hornfels
- Horns Rev
- Horns Rev 2
- Horns Rev Offshore Wind Farm
- Horsepower
- Horseradish peroxidase
- Horseshoe magnet
- Horseshoe vortex
- Horst and graben
- Horsts
- Horticultural therapy
- Horton overland flow
- Hose clamps
- Hoshin kanri
- Hospital accreditation
- Hospital-acquired infection
- Host
- Host tropism
- Host-based intrusion detection system
- Hostname
- Hot air balloons
- Hot air oven
- Hot atom
- Hot blast
- Hot cathode
- Hot corrosion
- Hot electron
- Hot filament
- Hot hardness
- Hot isostatic pressing
- Hot pressing
- Hot spots
- Hot springs
- Hot swapping
- Hot tapping
- Hot water storage tank
- Hot work
- Hot working
- Hot-carrier injection
- Hot-dip galvanization
- Hot-melt adhesive
- Hotchkiss drive
- Hotel
- Hotspots
- Hough transform
- Hour angle
- House
- House dust mites
- Household air pollution
- Household goods
- Household hazardous waste
- Householder transformation
- Housekeeping
- Housekeeping genes
- Hovercraft
- Hpa
- Hsp27
- Hsp70
- HttpUnit
- Hub-and-spoke
- Hubbard model
- Hubbert Curve
- Huber loss
- Hubo
- Hubs
- Hugin
- Huh7
- Huisgen Cycloaddition
- Hull
- Human Connectome Project
- Human Genome Project
- Human Metabolome Database
- Human Microbiome Project
- Human Protein Atlas
- Human body
- Human body model
- Human brain
- Human cloning
- Human coronavirus 229e
- Human coronavirus oc43
- Human cytomegalovirus
- Human equivalent
- Human error
- Human eye
- Human fat