Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
om
←
Proto-Celtic
*omos
(inherited(gv/sga))
←
Proto-Indo-European
[[*h₃emós]], [[*h₂eh₃mós]]
(inherited(gv/sga))