Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
jetsam
←
English
jettison
(doublet)
←
Middle English
jetteson
(inherited)
→
English
jettison
(doublet)
→
English
waveson
(mention)
→
English
ligsam
(mention)