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