8 suffix tion
Endings which sound like /ʃən/, spelt –tion, –sion, –ssion, –cian. Learn how to add the suffix -ion and –ian. Clues about whether to put t, s, ss or c before these suffixes often come from the last letter or letters of the root word. Focus specifically on the work mention. Lower Keystage 2 LKS2 Spelling Curriculum for UK.