| stubborn(persistent, continuous, lasting, continuing, remaining) |
| chronic(adjective, persistent, continuous, lasting, continuing) |
| continuing(persistent, continuous, lasting, remaining) |
| enduring(persistent, lasting, remaining) |
| lasting(persistent, remaining) |
| obstinate(persistent, continuous, lasting, continuing, remaining) |
| persistent(continuous, lasting, continuing, remaining) |
| tenacious(persistent, continuous, lasting, continuing, remaining) |
| constant(persistent, continuous, lasting, continuing, remaining) |
| abiding(persistent, continuous, lasting, continuing, remaining) |
| assiduous |
| ceaseless(persistent, continuous, lasting, continuing, remaining) |
| confirmed(persistent, continuous, lasting, continuing, remaining) |
| continual(persistent, continuous, lasting, continuing, remaining) |
| continuous(persistent, lasting, continuing, remaining) |
| deep-rooted(persistent, continuous, lasting, continuing, remaining) |
| deep-seated(persistent, continuous, lasting, continuing, remaining) |
| diligent |
| dogged |
| ever-present(persistent, continuous, lasting, continuing, remaining) |