| permanent(adjective, firm, true, fixed, constant) |
| unerasable |
| lasting(adjective, great, firm, extraordinary, true) |
| ineradicable(adjective, indestructible) |
| ingrained(adjective, fixed, indestructible, deep-seated, in-built) |
| indestructible(adjective, stability, unable, lasting) |
| fixed(adjective, firm, true, constant, steadfast) |
| enduring(adjective, great, extraordinary, outstanding, notable) |
| unforgettable(adjective, great, extraordinary, outstanding, notable) |
| undying(adjective, stability, permanent, long-term, lifelong) |
| fast(adjective, continue, firm, constant, steadfast) |
| ineffaceable(adjective, indestructible) |
| deep |
| stubborn(adjective, characteristic, quality, refusal, stubbornness) |
| constant(adjective, firm, true, fixed, steadfast) |
| imperishable(adjective, stability) |
| incorruptible |
| inexpungible(adjective, permanent, long-term, lifelong, indestructible) |
| inextirpable(adjective, indestructible) |
| memorable(adjective, significant, memory, noteworthy, indestructible) |