- o'clock
- obey
- object
- occur
- ocean
- October
- of
- off
- offer
- office
- officer
- official
- often
- oh
- OK
- old
- on
- once
- one
- oneself
- only
- onto
- open
- operate
- operation
- opinion
- opposite
- or
- orange
- order
- ordinary
- organize
- other
- otherwise
- ought
- our
- ours
- ourselves
- out
- outdoor
- outdoors
- outside
- over
- overcoat
- owe
- own
- ox
大学英语PETS公共英语二级大纲单词单词大全〔O 〕课程包含47个英语单词词汇。