Here's what rhymes with undiffusible.
usable fusible reusable excusable unusable inexcusable Words that almost rhyme with undiffusible
movable crucible moveable provable dutiable disprovable immovable reducible removable deducible inducible improvable irreducible irremovable producible unmovable unmoveable reproducible suitable immutable luminal mutable disputable doable beautiful usual mutual indisputable renewable cuticle inscrutable irrefutable refutable assumable juvenile unsuitable delusional presumable commutable unusual executable consumable construable attitudinal latitudinal nonrenewable manoeuvrable institutional longitudinal distributional constitutional unconstitutional