| HG | A Hunter Graham 
| Others |
| HG | haemoglobin; Hb is generally preferred
| Others |
| HG | Hairy Guy
| Others |
| HG | Half Gram
| Others |
| HG | Handle Graphics
| Others |
| HG | Handy Games
| Others |
| HG | haplogroup
| Others |
| HG | haptoglobin
| Others |
| HG | Harbour Generator
| Others |
| HG | Hard Gainer
| Others |
| HG | Hard Gay
| Others |
| HG | Hardware Gain
| Others |
| HG | Harmonic Generator
| Others |
| HG | Harriett Goodmuth
| Others |
| HG | Harris Giles
| Others |
| HG | Harrow Graft
| Others |
| HG | Harvey George
| Others |
| HG | Haute Garonne
| Others |
| HG | Hawaiian Guitar
| Others |
| HG | Hazard Grade
| Others |
| HG | He Girls
| Others |
| HG | Head Girl
| Others |
| HG | Healthy Group
| Others |
| HG | Heartland Gamers
| Others |
| HG | Heather Gail
| Others |
| HG | Heather Green
| Others |
| HG | Heavens Games
| Others |
| HG | Heavy Gauge
| Others |
| HG | Heavy Gold
| Others |
| HG | Helen Golz
| Others |
| HG | Helicopter Gasoline
| Others |
| HG | Helicopter Guy
| Others |
| HG | Helmet Guy
| Others |
| HG | Herbert George
| Others |
| HG | Hermione Granger
| Others |
| HG | Herpes Gestationis
| Others |
| HG | Hertzsprung Gap
| Others |
| HG | Heterodera Glycines
| Others |
| HG | Hey Guys
| Others |
| HG | Hidden Gem
| Others |
| HG | High Gain
| Others |
| HG | High Gear
| Others |
| HG | High Gloss
| Others |
| HG | High Grade
| Others |
| HG | High Ground
| Others |
| HG | High Growth
| Others |
| HG | Higher Gains
| Others |
| HG | Higher Grade
| Others |
| HG | Highly Gifted
| Others |
| HG | Hilda Ginklefief
| Others |
| HG | Hill Giant
| Others |
| HG | His Glory
| Others |
| HG | Histologic Grade
| Others |
| HG | Hitchhiker Goddard Mission
| Others |
| HG | Ho Grandma
| Others |
| HG | Hog Grade
| Others |
| HG | Hollow Grounds
| Others |
| HG | Holographic Grating
| Others |
| HG | Holohedral Group
| Others |
| HG | Holy Grail
| Others |
| HG | Home And Garden
| Others |
| HG | Home Gateway
| Others |
| HG | Home Grown
| Others |
| HG | Home Guard
| Others |
| HG | Honor Greatness
| Others |
| HG | Honorary Girl
| Others |
| HG | Horse Gate
| Others |
| HG | Horse Guard
| Others |
| HG | Host Group
| Others |
| HG | House Guest
| Others |
| HG | Huge Grain
| Others |
| HG | Hugh Grant
| Others |
| HG | Human Genome
| Others |
| HG | Human Geography
| Others |
| HG | Human Gonadotropin
| Others |
| HG | Human Growth
| Others |
| HG | Hunan Garden
| Others |
| HG | Hunger Games
| Others |
| HG | Hungry Goose
| Others |
| HG | Hunter Gatherer
| Others |
| HG | Hunter Gatherers
| Others |
| HG | Hunter Girl
| Others |
| HG | Hunting And Gathering
| Others |
| HG | Hunting Grounds
| Others |
| HG | Hurricane Gate
| Others |
| HG | Husky Guy
| Others |
| HG | Hybird Game
| Others |
| HG | Hyper Glide
| Others |
| HG | Hyper Growlithe
| Others |
| HG | Hyperemesis Gravidarum
| Others |
| HG | HyperGen, Inc.
| Others |
| HG | hypoglossal
| Others |
| HG | Mercury
| Element |
| Hg | Mercury (Hydrargyrum)
| Others |
| HG | mercury Hg
| Others |