- oaxaca de juarez
- obbligato
- obedient plant
- obediently
- obeah
- obeche
- obechi
- obeisance
- obeisant
- obfuscats
- obi
- obelisk
- obesity diet
- obfuscation
- obidoxime chloride
- obit
- oas
- ob river
- obedience
- obiter dictum
- obituary page (of a news paper)
- object code
- object dart
- object language
- object lens
- object lesson
- object of a preposition
- object of love
- object recognition
- obligate
- object_oriented database management system
- object program
- object_oriented programing
- object_oriented programing language
- object_oriented programming
- object_oriented programming language
- objected to
- objectify
- objectionable
- objection
- objectionableness
- objective case
- objective correlative
- objectively
- objectiveness
- objectivisation
- objectivism
- objectivity
- objurgate
- objurgation