Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
spaț
←
Proto-Indo-European
*speh₁-
(derived)
←
Latin
spatium
(inherited)
←
Romanian
spațiu
(doublet)
→
Romanian
spațiu
(doublet)