Group of two words that have the same etimo but different phonetic evolution, via equity or popular and the cultured. In our language we have many examples of such as silly and stunned atonitus, ear and auricle of auricle, broth and warm calidus, key and key clavis, finger and digit of digitus, speech and fable fable, fire and focus of focus, wood and matter of matter, work and opera opus, Word and parable of parabola, plain and planus flat and many others.
