Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
flathe
←
Old English
*flaþa
(inherited)
←
Middle English
flathon
(doublet)
←
Proto-West Germanic
*flaþō
(derived)
→
English
flathe
(inherited)
→
English
flathon
(cognate)
→
Middle English
flathon
(doublet)
→
Middle English
flaun
(doublet)