O: Wear Your Dictionary's: November 2020: Redbubble Inventory: [Moribund Institute]

• Overarching – (by extension) all-embracing or overwhelming
• Overchoice [オーバーチョイス] – An excessive amount of choice
  wiktionary.org/overchoice
• Osteology [オスティーオロジー] – (anatomy) The scientific study of the morphology and pathology of bones.
  wiktionary.org/osteology
• Ossuary [アースユアリー] – A container, receptacle, or building for holding the bones of the dead.
  wiktionary.org/ossuary
• Obdormition [オブドーミション] – The sensation of numbness when a limb "falls asleep."
  wiktionary.org/obdormition
• Oneironautics [オーネーロノーティクズ] – Lucid dreaming; the ability to explore dreams.
  wiktionary.org/oneironautics
• Ordoliberalism [オードーリベラリズム] – A political philosophy emphasizing the free market’s potential.
  wiktionary.org/ordoliberalism
• Orthopraxy – Right belief combined with right practice; often used in contrast with orthodoxy in liberation theology.
• Orthographic [オーソグラフィック] – A projection method with parallel rays used in maps and design.
  wiktionary.org/orthographic
• on-loan [オン・ローン] – Something temporarily borrowed.
  wiktionary.org/on-loan
• Ontological [オントロジカル] – Pertaining to the nature of being or existence.
  wiktionary.org/ontological
• Osteitis [アースティーアイティス] – (pathology) Inflammation of bone.
  wiktionary.org/osteitis
• Organicism [オーギャニシスム] – (philosophy) Viewing society or the universe as an organism.