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