not subject or susceptible to change or variation in form or quality or nature
changeless, unvarying, constant, immutable, invariant, unalterable
immutableadjectiveUnable to be changed without exception.
immutableadjectiveNot able to be altered in the memory after its value is set initially, such as a constant.
English Synonyms and Antonyms
Durable (Latin durus, hard) is said almost wholly of material substances that resist wear; lasting is said of either material or immaterial things. Permanent is a word of wider meaning; a thing is permanent which is not liable to change; as, a permanent color; buildings upon a farm are called permanent improvements. Enduring is a higher word, applied to that which resists both time and change; as, enduring fame.
See synonyms for TRANSIENT.
abiding, changeless, constant, durable, enduring, fixed, invariable, lasting, permanent, perpetual, persistent, stable, steadfast, unchangeable, unchanging
Dictionary of English Synonymes
unchangeable, invariable, unalterable, undeviating, constant, permanent, stable
PPDB, the paraphrase database
List of paraphrases:
unchanging, unchangeable, enduring, non-corrodible, unalterable, irrevocable, static, unchanged