Browse the Concise Encyclopedia
- holy alliance
- holy league
- holy of holies
- holy roman empire
- holy spirit
- holy synod
- holy war
- home rule, irish
- homeopathy
- homeostasis
- homer
- homestead movement
- homestead national monument of america
- homestead strike
- homicide
- hominid
- hominin
- homo
- homo erectus
- homo habilis
- homo sapiens
- homology
- homosexuality
- homozygote and heterozygote
- honda motor co.
- honey
- honeybee
- honeysuckle family
- hong kong
- hong kyong-nae rebellion
- hongshan culture
- honiara
- honshu
- hooch, pieter de
- hood, mount
- hoover commission
- hoover dam
- hop
- hope diamond
- hopewell culture
- hopi
- hoplite
- hopper, edward
- horizon
- horizontal bar
- hormone
- hormoz
- hormuz, strait of
- horn of africa
- horn, cape
- hornbill
- hornblende
- horne islands
- horned owl
- horned toad
- hornwort
- horoscope
- horror story
- horse
- horse racing
- horse-chestnut family
- horsefly
- horsehair worm
- horsemanship
- horsepower
- horseradish
- horseshoe crab
- horseshoe pitching
- horsetail
- horticulture
- horus
- horyu temple
- hosea
- hosiery
- hospice
- hospital
- hosta
- hot rod
- hot spot
- hot spring
- hot springs national park
- hotel
- hound
- house mouse
- house sparrow
- house un-american activities committee (huac)
- housefly
- houseplant
- hovenweep national monument
- howard family
- howard university
- howard, ron
- howe caverns
- howler monkey
- html
- http
- hu, sia, and heh
- huainanzi
- huang-lao
- huangdi