Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Estonian
kolmas
←
Proto-Finnic
*kolmanci
(inherited)
→
Ingrian
kolmas
(cognate)
→
Karelian
kolmas
(cognate)