act = acto
architect = arquitecto
aspect = aspecto
conflict = conflicto
contact = contacto
correct = correcto (adjective)
direct = directo (adjective)
effect = efecto
elect = electo (adjective)
exact = exacto
impact = impacto
insect = insecto
perfect = perfecto
product = producto
project = proyecto
strict = estricto
Some exceptions: contract (contrato), object (objeto), respect (respeto).
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