Words ending in -tion
station, fiction, motion, national, section, addition, subtraction, potion, option, introduction.
Words with a short ‘u’ sound spelt with ‘ou’
enough, young, touch, double, trouble, country, courage, rough, tough, cousin
Adding the prefix auto- (meaning ‘self or own’)
autograph, autobiography, automatic, autofocus, autocorrect, autopilot, autorotate, automobile, autonomy, autocue.