Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
esporgar
←
Catalan
expurgar
(doublet)
←
Latin
expurgō
(derived)
→
Catalan
expurgar
(doublet)