Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
тематичний
←
Belarusian
тэматы́чны
(cognate)
←
Polish
tematyczny
(cognate)
←
Russian
темати́ческий
(cognate)
←
Ukrainian
тема́тика
(affix)
←
Ukrainian
-и́чний
(affix)