Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Serbo-Croatian о-

→ Serbo-Croatian о (mention)
→ Serbo-Croatian офарбати (affix)
→ Serbo-Croatian одјенути (affix)
→ Serbo-Croatian оденути (affix)
→ Serbo-Croatian обавити (affix)
→ Serbo-Croatian ојачати (affix)
→ Serbo-Croatian опазити (affix)
→ Serbo-Croatian омладина (affix)
→ Serbo-Croatian ољуштити (affix)
→ Serbo-Croatian оговарати (mention)