Here's what rhymes with nondecodable.
erodible Words that almost rhyme with nondecodable
notable potable quotable approachable inapproachable irreproachable unapproachable reproachable knowable sociable nonnegotiable emotional devotional disposable negotiable notional revokable controllable unknowable unsociable renegotiable consolable promotional uncontrollable inconsolable unemotional overemotional