| recurrent(adjective, steady, regular, normal, constant) |
| regular(verb, adjective, sound, steady, normal) |
| repeated(adjective, determined, steady, regular, normal) |
| perennial(adjective, constant, continuous, enduring, permanent) |
| frequent(adjective, common, steady, regular, normal) |
| lasting(adjective, persistent, constant, continuous, endless) |
| monotonous(adjective, regular, normal, persistent, constant) |
| permanent(adjective, steady, stable, persistent, constant) |
| repetitive(adjective, continuous) |
| unrelenting(adjective, firm, determined, steady, persistent) |
| infinite(adjective, end, constant, abundant, endless) |
| round-the-clock(adjective, continue, persistent, continual) |
| uniform(adjective, steady, regular, persistent, even) |
| unvarying(adjective, steady, regular, persistent, even) |
| continuing(adjective, strong, firm, determined, steady) |
| sempiternal(adjective, eternal, perpetuity) |
| unchanging(adjective, steady, persistent, constant, continuous) |
| chronic(adjective, persistent, constant, continuous, endless) |
| continued(adjective, strong, firm, determined, steady) |
| enduring(adjective, determined, steady, stable, persistent) |