| abiding(adjective, enduring, lasting, permanent, everlasting) |
| amaranthine(adjective, constant, abundant, unrestrained, endless) |
| continual(adjective, constant, continuous, enduring, lasting) |
| infinite(adjective, constant, abundant, unrestrained, endless) |
| ageless |
| continuous(adjective, constant, abundant, continuous, unrestrained) |
| incessant(adjective, constant, abundant, continuous, permanent) |
| indelible(adjective, stability, permanent, long-term, lifelong) |
| indissoluble(adjective, stability, permanent, everlasting, eternal) |
| never-ending(adjective, constant, abundant, endless, infinite) |
| durable(adjective, enduring, lasting, permanent, recurrent) |
| fixed(adjective, enduring, lasting, permanent, perpetual) |
| incorruptible(adjective, stability) |
| inextinguishable(adjective, stability) |
| long-term(adjective, permanent, lifelong) |
| persistent(adjective, continuous) |
| sempiternal(adjective, eternal, perpetuity) |
| unchanging(adjective, continuous, enduring, lasting, permanent) |
| unremitting(adjective, continuous, permanent, everlasting, uninterrupted) |
| dateless |