Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
njak
→
Serbo-Croatian
srebrenjak
(suffix)
→
Serbo-Croatian
srebrnjak
(suffix)
→
Serbo-Croatian
stolnjak
(suffix)
→
Serbo-Croatian
umnjak
(suffix)
→
Serbo-Croatian
jednjak
(suffix)