Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
-oi
←
Ancient Greek
-οι
(borrowed)
←
Ancient Greek
-ος
(mention)
←
Latin
-us
(mention)
←
Latin
-ī
(mention)