Here are words with tion
Dictionary
connection
projection
population
detention
correction
population
concentration
There are no words in the English language that start with those letters, however there are thousands that end with 'tion'.
There are plenty of words that end with "tion", but none that start with K unfortunately!
nouns
nouns
Nouns
attentions
Ation is not a prefix; it is a suffix. Some words with this suffix are specialization, aggravation, and alternation.
Elation
combinationconfrontationcorrectionperfectionrepetitionintroductioninfectionaffectionaccommodationcommendationcommunicationammunitionimmunizationconductionreflectionrefractioncondensationinformationerectionejaculationpredeterminationdeterminationfiltrationinsulationeverprotion
petition completion competition
keratinisation
There are many "tion" words in the English language, as this suffix is commonly used to form nouns from verbs. Some examples include "organization," "education," and "communication." It is difficult to provide an exact number as new words are constantly being created.