habit -
(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition; "owls have nocturnal habits"; "she had a habit twirling the ends of her hair"; "long use had hardened him to it"
usage,
usance,
custom the customary manner in which a language (or a form of a language) is spoken or written; "English usage"; "a usage borrowed from French"
second nature acquired behavior that is practiced so long it seems innate
habit -
a distinctive attire worn by a member of a religious order
attire,
garb,
dress clothing of a distinctive style or for a particular occasion; "formal attire"; "battle dress"
religious belief,
religion,
faith a strong belief in a supernatural power or powers that control human destiny; "he lost his faith but not his morality"