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Our thesaurus is a dictionary of synonyms for many English words. On this page you can find a synonym (or another word) for substantiating. Whether you're a writer, or student, or just a person interested in finding words like substantiating - Thesaurus.net will help you to get exactly what you need.
adducing, attesting, authenticating, avouching, betokening, connoting, corroborating, declaring, deposing, documenting, evincing, exemplifying, exhibiting, illustrating, indicating, manifesting, observing, stating, supporting, testifying, validating, vouching, witnessing.