Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Swedish
tonår
→
Norwegian Bokmål
tenår
(cognate)
→
Norwegian Nynorsk
tenår
(cognate)
→
Swedish
tonåring
(suffix)