abiding Synonyms

enduring imperishable ticking timeless towardly unappealable undestroyable prolonged undying unmovable utile vestigial weathering termless tarrying surviving remaining residentiary ruly sempervirent sempiternal sequacious stable stabler standing steadfast steady stomaching unceasing unending unquestioning unflagging unchanged age-long deep-rooted unvarying occupational open-ended organisational organizational unrecoverable unfaltering unmodifiable set in stone never-ending unchanging unshaken unchangeable procedural unaltered