Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
ecumenical
←
English
ecumenic
(suffix)
←
English
al
(suffix)
→
English
ecumenically
(suffix)
→
English
ecumenicalism
(suffix)
→
English
nonecumenical
(prefix)
→
English
ecumaniac
(blend)
→
English
protoecumenical
(prefix)