| changeless |
| coeternal |
| consecutive(adjective, steady, stable, regular, constant) |
| cyclical(adjective, continuous) |
| direct(continuous, continual, uninterrupted, nonstop) |
| featureless(adjective, continuous) |
| gapless(adjective, continuous) |
| limitless(adjective, endless, infinite, boundless, incessant) |
| prolonged(adjective, steady, stable, regular, constant) |
| protracted(adjective, endless, infinite, boundless, incessant) |
| seamless(adjective, continuous) |
| undeviating(adjective, continuous) |
| unflagging(adjective, strong, firm, determined, steady) |
| unlimited(adjective, endless, infinite, boundless, limitless) |
| amaranthine(constant, continuous, endless, unrelenting, infinite) |
| boundless(adjective, continuous, endless, infinite, everlasting) |
| consistent(adjective, persistent, continuous, endless, relentless) |
| dateless(steady, constant, continuous, lasting, permanent) |
| day-and-night(adjective, constant, continuous, endless, infinite) |
| deathless(adjective, perpetuity) |