| overlong(adjective, great, excite, slow, high) |
| tedious(adjective, dull, slow, boring, late) |
| time-consuming(adjective, dull, moderate, low, stiff) |
| chronic(adjective, continue, persistent, constant, lasting) |
| maintained(verb, adjective, constant, continued) |
| slow(adjective, boring, tedious, late, rambling) |
| delayed(verb, adjective, dull, low, slow) |
| elongate(adjective, great, deep, high, remote) |
| endless(adjective, constant, huge, immense, massive) |
| lifelong(adjective, persistent, lasting, durable, remaining) |
| persistent(adjective, continue, constant, lasting, protracted) |
| prolix(adjective, slow, boring, tedious, late) |
| spun out(verb, expression, adjective, phrasal verb, great) |
| abiding(adjective, persistent, lasting, remaining, continued) |
| continuous(adjective, persistent, constant, lasting, unremitting) |
| dull(adjective, slow, tedious, late, protracted) |
| enduring(adjective, great, deep, high, persistent) |
| everlasting(adjective, durable) |
| perennial(adjective, persistent, lasting, durable, remaining) |
| perpetual(adjective, steady, stable, regular, constant) |