| grip(verb, continue, grasp, endure) |
| hammer away(expression, support, study, give, force) |
| haunt(verb, follow, harass, trace, track) |
| keep at it(expression, idiom, work, persist) |
| keep the ball rolling(expression, idiom, advance, maintain, continue) |
| labor(verb, activity, move, work, develop) |
| lengthen(verb, advance, maintain, continue, extend) |
| live on(verb, expression, advance, keep, maintain) |
| live through(verb, expression, keep, overcome, continue) |
| loiter(verb, advance, maintain, continue, extend) |
| make headway(expression, advance, maintain, continue, extend) |
| move ahead(expression, advance, maintain, continue, extend) |
| move behind(verb, expression, follow, harass, trace) |
| never cease(expression, advance, maintain, continue, extend) |
| officiate(verb, move, work, develop, do) |
| operate(verb, move, work, keep, develop) |
| oppose(verb, support, stop, force, attack) |
| oppress(verb, follow, harass, trace, track) |
| outlast(verb, advance, keep, maintain, overcome) |
| outlive(verb, advance, keep, maintain, overcome) |