Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
ruïna
←
Latin
ruīna
(derived)
→
Catalan
runa
(mention)
→
Catalan
roina
(doublet)
→
Catalan
roí
(mention)