Synonyms of 'tradition'
a country steeped in tradition
2 established practice
She has carried on the family tradition of giving away plants.
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A convention is a way of behaving that is considered to be correct or polite by most people in a society.
It's just a social convention that men don't wear skirts.
A custom is an activity, a way of behaving, or an event which is usual or traditional in a particular society or in particular circumstances.
The custom of lighting the Olympic flame goes back centuries.
Thesaurus for tradition from the Collins English Thesaurus
A tradition is a custom or belief that has existed for a long time.