| confirmed(adjective, fixed, persistent, constant, continuous) |
| consecutive(adjective, continuous, sequence) |
| consistent(adjective, wild, certain, fixed, even) |
| continuance(noun, increase, strength, line, resolution) |
| continuation(noun, increase, strength, delay, development) |
| cyclic(adjective, regular, scheduled, once-a-month) |
| deep-rooted(adjective, fixed, persistent, hardened, lasting) |
| deep-seated(adjective, fixed, persistent, continuous, hardened) |
| diligent |
| direct |
| dogged(adjective, strong, firm, determined, steady) |
| endurance(noun, increase, power, strength, line) |
| even(adjective, slow, steady, regular, fixed) |
| faithful(adjective, certain, persistent, constant, reliable) |
| firm(adjective, strong, wild, determined, familiar) |
| immutable(fixed, static, unvarying, unchangeable, unalterable) |
| increasing(noun, adjective, increase, line, constant) |
| indissoluble(adjective, enduring, permanent, remaining, long-term) |
| indomitable(adjective, strong, firm, determined, steady) |
| inexhaustible(adjective, strong, firm, certain, determined) |