Maintain
Part of speech: verb
Definition: to keep up; to preserve to declare or affirm a point of view to be true
Example sentence: The people know their rights, and they are never slow to assert and maintain them when they are invaded.
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: It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.