Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
mačor
←
Proto-Slavic
*mačerъ
(inherited)
←
Proto-Slavic
*maca
(mention)
←
Proto-Slavic
*-erъ
(mention)