Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
автентичність
←
Belarusian
аўтэнты́чнасць
(cognate)
←
Polish
autentyczność
(cognate)
←
Russian
аутенти́чность
(cognate)
←
Ukrainian
автенти́чний
(affix)
←
Ukrainian
-ість
(affix)