| protracting(increase, line, extension, persistence, continuance) |
| protraction(extension, persistence, continuance) |
| rattling on |
| reaching |
| recurrent(continuous, endless, everlasting, uninterrupted, recurring) |
| recurring(continuous, endless, everlasting, uninterrupted) |
| reoccurring(continuous, endless, everlasting, uninterrupted, recurring) |
| repeated(continuous, endless, everlasting, uninterrupted, recurring) |
| repeating(continuous, endless, everlasting, uninterrupted, recurring) |
| repetitious(continuous, endless, everlasting, uninterrupted, recurring) |
| returning(continuous, endless, everlasting, uninterrupted, recurring) |
| scheduled(happening, on) |
| sempiternal(continuous, endless, everlasting, uninterrupted, recurring) |
| sequel(increase, line, extension, persistence, continuance) |
| sequent(adjective, consecutive) |
| serial(adjective, order) |
| succession(increase, line, extension, persistence, continuance) |
| successional(adjective, consecutive) |
| supplement(increase, line, extension, persistence, continuance) |
| sustaining(increase, line, extension, persistence, continuance) |