Keep
Part of speech: noun
Definition: Care, notice. The main tower of a castle or fortress, located within the castle walls. The food or money required to keep someone alive and healthy; one's support, maintenance.
Part of speech: verb
Definition: To maintain possession of. To maintain the condition of. To remain in, to be confined to. To wait for, keep watch for. To restrain. To continue. To remain edible or otherwise usable. To remain in a state. To act as wicket-keeper. to raise; to care for.
Example sentence: The purpose of separation of church and state is to keep forever from these shores the ceaseless strife that has soaked the soil of Europe with blood for centuries.
Sustenance
Part of speech: noun
Definition: Something that provides support or nourishment.
Example sentence: I eat healthily as much as I can - meat, protein, carbs as well. I like my pasta; I like my rice. I like to have that sort of sustenance in me, because I'm always thinking of survival.