Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
natal
←
Catalan
Nadal
(doublet)
←
Latin
natalis
(borrowed)
→
Catalan
nadal
(doublet)
→
Catalan
Nadal
(doublet)