| no end of(expression, adjective, idiom, infinite, unfathomable) |
| no end to(expression, adjective, idiom, infinite, unfathomable) |
| non-stop |
| nonstop |
| not finishing(expression, adjective, constant, monotonous, infinite) |
| not stopping(expression, adjective, constant, monotonous, infinite) |
| on and on(expression, idiom, adverb, continuously, forever) |
| overlong(adjective, slow, boring, constant, tedious) |
| perennial(adjective, continuous, lasting, permanent, everlasting) |
| perennially |
| permanently |
| persistent(adjective, continuous, lasting, permanent, everlasting) |
| prolix(adjective, slow, boring, tedious, late) |
| prolonged(adjective, slow, boring, tedious, late) |
| relentless(adjective, lasting, permanent, everlasting, unending) |
| relentlessly(adverb, endlessly, continuously, forever, repeatedly) |
| self-perpetuating(adjective, constant, abundant, unrestrained, infinite) |
| sempiternal(adjective, absolute, continuous, vast, endless) |
| sesquipedalian |
| slow(adjective, boring, tedious, late, rambling) |