Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
svikari
→
Norwegian Bokmål
sviker
(derived)
→
Norwegian Nynorsk
svikar
(derived)
→
Swedish
svikare
(derived)