A fourteen (14) letter word that ends with ion or tion: administration
Radion
dandelion, diversion, operation
fusion
an 8 letter word that describes the relation ship between the pilgrims and native Americans that starts with an a and ends with an e
occupation
Rotation radiation
Populat ion
habitation
"definition"
An example verb that ends with "ion" is vacation(vacations, vacationing, vacationed)Example sentence: We always vacation at the beach.The word "vacation" also functions as a noun.
occupation
tion