owow /aʊ/ interjection 
used to express sudden pain: 
‘Ow, that hurts!’
used to express sudden pain: ‘Ow, that hurts!’- open-plan
- open primary
- open prison
- open sandwich
- open season
- open sesame
- open source
- open system
- open-toed
- Open University
- open verdict
- open vowel
- openwork
- opera
- operable
- opera house
- operate
- operatic
- operatically
- operating room
- operating system
- operating table
- operating theatre
- operation
- operational