The suffix "-tion" refers to a state of being, an action or an associated meaning. The suffix is attached to nouns and is used to transfer a verb into an abstract noun.
As an example, adding the suffix "-tion" to the verb "revolt" turns the word into the noun "revolution." The suffix "-tion" has the same meaning as the suffix "-sion." The spelling of the root word dictates which suffix is attached to the end. The suffix "-tion" follows words that end in "-ate," as well as words that end in any consonant other than the letters L, N or R.