Custom – The frequent repetition of an act, to the extent that it becomes characteristic of the group of people performing the act.
Folk culture – Culture traditionally practiced by a small, homogeneous, rural group living in relative isolation from other groups.
Habit – A repetitive act performed by a particular individual.
Popular culture – Culture found in a large, heterogeneous society that shares certain habits despite differences in other personal characteristics.
Taboo – A restriction on behavior imposed by social custom.