| constant(adjective, common, natural, usual, regular) |
| persistent(adjective, continue, usual, regular, routine) |
| lasting(adjective, fixed, persistent, constant, current) |
| confirmed(adjective, set, continue, usual, fixed) |
| continuing(adjective, continue, fixed, persistent, current) |
| habitual(adjective, continue, common, usual, regular) |
| inveterate(adjective, set, continue, fixed, persistent) |
| continual(adjective, usual, regular, routine, normal) |
| hardened(adjective, set, usual, fixed, established) |
| perennial(adjective, persistent, hardened, enduring, lasting) |
| long-lived(adjective, persistent, continuous, hardened, lasting) |
| perpetual(adjective, usual, regular, routine, normal) |
| incessant(adjective, persistent, constant, continuous, endless) |
| usual(adjective, common, regular, normal, established) |
| accustomed(adjective, set, common, natural, usual) |
| fixed(adjective, set, common, natural, usual) |
| ingrained(adjective, set, fixed, established, hardened) |
| permanent(adjective, usual, regular, routine, normal) |
| routine(noun, adjective, usual, regular, normal) |
| continuous(adjective, fixed, persistent, constant, endless) |