Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*osmъ
→
Belarusian
восьмы
(inherited)
→
Czech
osmý
(inherited)
→
Polish
ósmy
(inherited)
→
Slovak
ôsmy
(inherited)
→
Ukrainian
восьмий
(inherited)