| nonstop(adjective, continue, persistent, constant, continuous) |
| perennial(adjective, constant, continuous, enduring, lasting) |
| non-stop |
| timeless(adjective, continue, steady, constant, continuous) |
| unbroken(adjective, steady, persistent, constant, continuous) |
| undying(adjective, continuous, infinite, permanent, boundless) |
| abiding(adjective, stable, persistent, constant, continuous) |
| aeonian |
| infinite(adjective, continuous, endless, unrelenting, boundless) |
| regular(adjective, steady, stable, persistent, constant) |
| sustained(adjective, persistent, constant, continuous, endless) |
| unvarying(adjective, steady, persistent, constant, continuous) |
| continued(adjective, strong, firm, determined, steady) |
| enduring(adjective, steady, stable, persistent, constant) |
| immortal(adjective, continuous, endless, unrelenting, infinite) |
| recurrent(adjective, continuous) |
| round-the-clock(adjective, continue, continual, incessant) |
| unchanging(adjective, steady, persistent, constant, continuous) |
| chronic(adjective, persistent, constant, continuous, endless) |
| continuing(adjective, strong, firm, determined, steady) |