-tion/-sion (act or state)
-tion, -sion
Makes a noun from a verb.
The decision to hold the fair outdoors was a good one.
Celebration
A happy event for a special day.
The school celebration had music and dance.
Decision
A choice you make after thinking.
Sana made the decision to join the art club.
Remember: Not a fixed rule: verbs ending -de/-se often take -sion (decide → decision); many others take -tion (act → action). Stress falls just before it: SEL-uh-brate → sel-uh-BRAY-shun.