Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
obra
←
Latin
opera
(inherited)
←
Portuguese
ópera
(doublet)
←
Old Portuguese
obra
(inherited)
→
Kabuverdianu
óbra
(derived)
→
Papiamentu
obra
(derived)
→
Portuguese
ópera
(doublet)