Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
lacuna
←
Latin
lacūna
(borrowed)
←
Portuguese
lagoa
(doublet)
←
Portuguese
laguna
(mention)
→
Portuguese
laguna
(mention)
→
Portuguese
lagoa
(doublet)