Here's what rhymes with demonstrable.
Words that almost rhyme with demonstrable
penetrable eligible equitable heritable educable pensionable inevitable creditable impenetrable estimable reputable revocable predicable intelligible negligible questionable objectionable irrevocable impressionable inequitable inheritable disreputable discreditable pestilential exceptionable unmentionable unintelligible unquestionable unobjectionable unexceptionable