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