Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
obra
←
Catalan
òpera
(doublet)
←
Latin
opera
(inherited)
←
Latin
opus
(mention)
←
Old Occitan
(inherited)