There is a total of 85677 clues beginning with o
- Of a heart part
- Of a heart valve
- Of a heat science
- Of a heavenly belt
- Of a heavenly body
- Of a heavy metal
- Of a heavy metallic element
- Of a heifer
- Of a hereditary factor
- Of a high range
- Of a higher class
- Of a higher quality
- Of a Hindu culture
- Of a Hindu philosophy
- Of a hip bone
- Of a hipbone
- Of a historic city in Mesopotamia
- Of a historic interval
- Of a historic period
- Of a historic period
- Of a historic river
- Of a historical period
- Of a holy period
- Of a hope chest
- Of a horny shell
- Of a household
- Of a household: Latin
- Of a huge desert
- Of a husband
- Of a hypothetical unit of living matter
- Of a jellyfish
- Of a Jewish sect
- Of a joint: Comb form
- Of a judge's chamber
- Of a judge's chamber
- Of a judge's private office
- Of a judge's sanctum
- Of a killing: Comb form
- Of a kind
- Of a kind of cereal
- Of a kind of schizophrenia
- Of a kind
- Of a king
- Of a king or queen
- Of a king's crown
- Of a king
- Of a kingdom
- Of a kiss
- Of a kittiwake
- Of a knob
- Of a knot
- Of a lake area
- Of a lake in Egypt, described by Herodotus
- Of a language group
- Of a language impairment
- Of a large artery
- Of a large global area
- Of a large lake
- Of a large peninsula on the Black Sea
- Of a large store of data
- Of a Latin people
- Of a Latin race: Comb form
- Of a lavender shade
- Of a layer
- Of a layer of rock
- Of a leaf stem
- Of a league
- Of a leg bone
- Of a legislative chamber
- Of a light unit
- Of a lily family
- Of a line: Abbr
- Of a lionlike color
- Of a liquid's specific gravity
- Of a literary form
- Of a lofty mountain range
- Of a long mountain range
- Of a long, long time
- Of a long-ago era
- Of a lower social order
- Of a lump
- Of a lunar crater
- Of a lung area
- Of a lung part
- Of a lung section
- Of a lustrum
- Of a lyric poem
- Of a lyric poem
- Of a main artery
- Of a main artery
- Of a main channel
- Of a main line
- Of a major artery
- Of a major blood vessel
- Of a major Hebrew prophet
- Of a major philosopher
- Of a major trunk
- Of a Malayan port
- Of a manner
- Of a manner or form