Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
Вьетна́м
→
Mongolian
Вьетнам
(borrowed)
→
Russian
вьетнамский
(affix)
→
Russian
вьетнамец
(affix)
→
Russian
вьетнамка
(affix)