Following are all the undecaying like words, in the list below.
NONDECAYING
100% like undecaying
NONPERISHING
100% like undecaying
PERISHLESS
100% like undecaying
UNPERISHING
100% like undecaying
UNAGING
100% like undecaying
UNCORRUPTING
100% like undecaying
UNWASTING
100% like undecaying
NONDEGRADABLE
100% like undecaying
DECAYLESS
100% like undecaying
INCORRUPTIBLE
100% like undecaying
UNWEARING
100% like undecaying
UNWITHERABLE
100% like undecaying
UNPERISHABLE
100% like undecaying
UNFADABLE
100% like undecaying
UNDECAYABLE
100% like undecaying
NONDECAYED
100% like undecaying
UNFADEABLE
100% like undecaying
NONMORTAL
100% like undecaying
UNSTALING
100% like undecaying
UNWITHERING
100% like undecaying
WITHERLESS
100% like undecaying
UNDESTROYABLE
100% like undecaying
IMMORTAL
100% like undecaying
UNENDURING
100% like undecaying
NONTARNISHABLE
100% like undecaying
PERMANENT
100% like undecaying
INTRANSIENT
100% like undecaying
UNTARNISHABLE
100% like undecaying
NONRUSTING
100% like undecaying
INCORRUPTIVE
100% like undecaying
UNLASTING
100% like undecaying
INDESTRUCTIBLE
100% like undecaying
UNENDING
100% like undecaying
NONTARNISHING
100% like undecaying
UNBLEMISHABLE
100% like undecaying
UNCORRODABLE
100% like undecaying
UNBREAKING
100% like undecaying
NONENDURING
100% like undecaying
UNCORRUPT
100% like undecaying
UNBLEMISHING
100% like undecaying
NONROTTING
100% like undecaying
UNROTTABLE
100% like undecaying
WANELESS
100% like undecaying
UNTAINTABLE
100% like undecaying
NONTARNISH
100% like undecaying
UNTHAWING
100% like undecaying
NEVER-DYING
100% like undecaying
UNDECREMENTED
100% like undecaying
UNDURABLE
100% like undecaying
TIMELESS
100% like undecaying
UNDYING
100% like undecaying
INDECIDUOUS
100% like undecaying
UNDEGRADABLE
100% like undecaying
UNRUSTING
100% like undecaying
UNSPOILT
100% like undecaying
NONDEPRECIATED
100% like undecaying
UNFADING
100% like undecaying
UNROTTING
100% like undecaying
UNDEADLY
100% like undecaying
UNDEMOLISHABLE
100% like undecaying
UNERASABLE
100% like undecaying
UNROTTEN
100% like undecaying
NONDETERIORATING
100% like undecaying
UNABIDING
100% like undecaying
UNDIMINISHABLE
100% like undecaying
UNVANISHING
100% like undecaying
FADELESS
100% like undecaying
UNREGENERABLE
100% like undecaying
NONCORRODING
100% like undecaying
NONDECOMPOSABLE
100% like undecaying
UNROTTED
100% like undecaying
NONMUTABLE
100% like undecaying
UNEXHAUSTIBLE
100% like undecaying
UNSHATTERABLE
100% like undecaying
CONSUMELESS
100% like undecaying
SEMPITERNAL
100% like undecaying
UNLINGERING
100% like undecaying
UNWITHERED
100% like undecaying
NONTERMINATING
100% like undecaying
INCORRUPT
100% like undecaying
UNRENOUNCING
100% like undecaying
UNTRANSFIGURABLE
100% like undecaying
UNALTERING
100% like undecaying
UNSTAYABLE
100% like undecaying
UNBLEACHABLE
100% like undecaying
UNEXPIRED
100% like undecaying
UNPERISHED
100% like undecaying
UNLAPSING
100% like undecaying
RUSTLESS
100% like undecaying
UNDECOMPOSED
100% like undecaying
UNINCARNATED
100% like undecaying
UNMORIBUND
100% like undecaying
UNSULLIABLE
100% like undecaying
UNPRESERVABLE
100% like undecaying
UNADULTERABLE
100% like undecaying
UNDIMINISHING
100% like undecaying
UNSTILLABLE
100% like undecaying
UNVANQUISHABLE
100% like undecaying
UNPUTREFIABLE
100% like undecaying
UNPUTREFIED
100% like undecaying