habitation
Rotation radiation
RELATION
awn, ban, con, don, eon, fin, fan, gun, hen, ion, Jan, kin, Lon, man, nun, own, pun, run, ran, sun, tun, urn, van, win, yen, Zen
borate ion
ion onion
habitation
Populat ion
habitation
Transportation.
Mansion
One such word is mansion.
Transportation
The word that ends with "ion" is "suppression."
Some examples of places that end with "ion" include London, Hamilton, and Marion. These are just a few of the many places around the world that have names ending in "ion."
Competition
A fourteen (14) letter word that ends with ion or tion: administration
Zion, Lion, Pavillion...