Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
œuvrer
←
French
œuvre
(mention)
←
French
ouvrer
(mention)
←
French
ouvrir
(mention)
←
French
opérer
(doublet)
→
French
opérer
(doublet)
→
French
ouvrer
(doublet)
→
French
ouvrable
(mention)
→
French
désœuvrer
(prefix)