Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
hostal
←
Latin
hospitālis
(derived)
←
Latin
hospes
(mention)
←
Old Occitan
ostal
(derived)
→
Catalan
hospital
(doublet)