Punctual rhymes with:
contractual, factual, ineffectual, intellectual, conceptual, contractual, eventual, factual, habitual, ineffectual, intellectual, massmutual, parimutuel, perpetual, ritual, virtual
contractual, factual, ineffectual, intellectual, conceptual, contractual, eventual, factual, habitual, ineffectual, intellectual, massmutual, parimutuel, perpetual, ritual, virtual