add -ion: confession, connection, discussion, expression, impression, possession, protection, selection, prediction, invention, drop e then +ion: creation, decoration, estimation, evaporation, pollution, population, hibernation, calculation, station, demonstrate, revision, compulsion, drop e change d to s +ion: conclusion, collision, erosion, explosion, inclusion, persuasion, invasion, division, ends with vowel and d or t - change d or t to an s +sion: omission, admission, commission, permission, emission, ends with nd, ld, nt, or lt - drop last letter +sion: expansion, intension, ascension, distension, apprehension,

-ion suffix rule sort

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