aliveness, animation, living, life - the condition of living or the state of being alive; "while there's life there's hope"; "life depends on many chemical and physical processes"

subsistence - a means of surviving; "farming is a hard means of subsistence"

natural action, natural process, activity, action - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"

custom, usage, usance - accepted or habitual practice

continuance, continuation - the act of continuing an activity without interruption

holdover, hangover - something that has survived from the past; "a holdover from the sixties"; "hangovers from the 19th century"