obso - on-s
- official status
- official stenotype reporter
- official stoppage
- official tolerance
- official toll
- official trade policy
- official trade-union
- official version of smth
- official violence
- official visit
- official visitor
- official welcome
- officialdom
- officialize
- officially
- officially registered unemployed
- officially-backed candidate
- offset
- offset of the crisis
- offshore zone
