RichThesaurus
incommutable
incommutable
synonyms
unfading
set
fixed
lifelong
perdurable
unalterable
permanent
ineradicable
eternal
enduring
abiding
cast-iron
constant
indestructible
unchangeable
established
decided
immutable
invariant
invariable
hard and fast
unvarying
set in stone
lasting
deep-rooted
irreversible
perpetual
firm
changeless
incommutable
antonyms
commutable
variable
changeable