Synonyms for Unrecognisable (same or very similar meaning)
WordNet sense 1 (defying recognition as e.g. because of damage or alteration):
unrecognizableWordNet sense 2 (impossible to identify):
unidentifiableWordNet sense 3 (beyond recognition; in an unrecognizable manner):
unrecognizablyFrom the ODE community, based on WordNetadd/edit