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

→ Bulgarian Югославия (affix)
→ Bulgarian пчелояд (affix)
→ Bulgarian водопад (compound)
→ Bulgarian лекомислен (affix)
→ Bulgarian добродушие (affix)
→ Bulgarian равнодушие (affix)
→ Bulgarian водоскок (compound)
→ Bulgarian мироглед (compound)
→ Bulgarian малолетен (affix)
→ Bulgarian великодушие (affix)
→ Bulgarian богомолка (compound)
→ Bulgarian малодушие (affix)
→ Bulgarian дъждобран (affix)
→ Bulgarian ябълковиден (affix)
→ Bulgarian миролюбив (affix)
→ Bulgarian първоначален (affix)
→ Bulgarian родолюбив (affix)
→ Bulgarian водолюбив (affix)
→ Bulgarian трудоемък (affix)
→ Bulgarian Средновековие (affix)
→ Bulgarian целомъдрие (affix)
→ Bulgarian правосъдие (affix)
→ Bulgarian лешояд (affix)
→ Bulgarian личинкоядка (compound)
→ Bulgarian комароловка (compound)
→ Bulgarian мухоловка (compound)
→ Bulgarian червеношийка (compound)
→ Bulgarian козодой (compound)
→ Bulgarian бързолет (compound)
→ Bulgarian чичопей (compound)
→ Bulgarian кръсточовка (compound)
→ Bulgarian въртошийка (compound)
→ Bulgarian бързоходец (affix)
→ Bulgarian вълнолюбка (compound)
→ Bulgarian тъпоклюн (compound)
→ Bulgarian рибояд (compound)
→ Bulgarian сърпоклюн (compound)
→ Bulgarian брегобегач (affix)
→ Bulgarian дъждосвирец (compound)
→ Bulgarian кокилобегач (compound)