| allegiant(adjective, firm, solid, stable, fixed) |
| ardent(adjective, firm, solid, stable, fixed) |
| ceaseless(adjective, steady, regular, persistent, even) |
| certain(adjective, firm, solid, stable, fixed) |
| chronic(adjective, persistent, continuous, endless, relentless) |
| committed(steady, even, unchanging) |
| composed(adjective, calm, smooth, steady, temperate) |
| continuing(adjective, fixed, persistent, static, unchangeable) |
| cool(adjective, firm, solid, stable, fixed) |
| dependable(adjective, firm, solid, stable, fixed) |
| dispassionate(calm, composed, unflappable) |
| easy-going(adjective, calm, smooth, steady, temperate) |
| easygoing(calm, composed, unflappable) |
| endless(adjective, persistent, continuous, relentless, continual) |
| equability |
| eternal(adjective, steady, regular, fixed, persistent) |
| even-tempered(adjective, calm, smooth, steady, temperate) |
| everlasting(adjective, persistent, continuous, endless, relentless) |
| impassive |
| imperishable(adjective, fixed, static, unchangeable) |