Here's what rhymes with unassignable.
assignable nonassignable Words that almost rhyme with unassignable
viable sizable sizeable liable advisable definable likable likeable undefinable analyzable risible liveable survivable desirable undesirable excitable indefinable pliable inadvisable maniacal ascribable decidable certifiable notifiable climbable unlikeable unliveable reliable justifiable unreliable undeniable verifiable ammoniacal libidinal realizable classifiable recyclable deniable identifiable unjustifiable cognizable describable indictable reconcilable unverifiable rectifiable recognizable indescribable irreconcilable unrecognizable demoniacal unidentifiable monomaniacal