habit
a repetitive act performed by a particular individual.
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.
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.