KATION (an alternate spelling for CATION, a molecule with one more proton than electron)
workstation, weatherization, westernisation, westernization
There are no English words that meet the criteria.
There are plenty of words that end with "tion", but none that start with K unfortunately!
Elation
station, edition, caution, portion
Ation is not a prefix; it is a suffix. Some words with this suffix are specialization, aggravation, and alternation.
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'.
nouns
nouns
celebration calibration caption notation capitalization discussion question alliteration action section recommendation station
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern D--TION-. That is, eight letter words with 1st letter D and 4th letter T and 5th letter I and 6th letter O and 7th letter N. In alphabetical order, they are: dictions
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern A--TION-. That is, eight letter words with 1st letter A and 4th letter T and 5th letter I and 6th letter O and 7th letter N. In alphabetical order, they are: alations amations amotions auctions
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern U--TION. That is, seven letter words with 1st letter U and 4th letter T and 5th letter I and 6th letter O and 7th letter N. In alphabetical order, they are: unction unition