Intangible rhymes with:
tangible, tangible, changeable, exchangeable, interchangeable, tangible, acknowledgeable, agregable, changeable, chargeable, corrigible, eligible, exchangeable, illegible, incorrigible, ineligible, intelligible, interchangeable, knowledgeable, legible, manageable, negligible, rechargeable, salvageable, tangible, unintelligible, unmanageable
Intangible sounds like:
inadmissible, inadmissibly, intangibly, intensively