Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
реакція
←
Belarusian
рэа́кцыя
(cognate)
←
Latin
reāctiō
(derived)
←
Latin
reagō
(mention)
←
Polish
reakcja
(cognate)
←
Russian
реа́кция
(cognate)