persevere, endure, stay, hang on, hang in, prevail, remain, hold on, run, die hard, more...

cease, quit, surrender, abandon, desist

persevere, persistence, persistent, persistency, persistentness, more...

continue to,   to continue,   to keep going,   continue to exist,   continue to be,   continuing to,   still exist,   keep happening,   to last or endure,   continue to say