The word "cantingly" refers to speaking in a hypocritical or insincere manner. Some synonyms for this word include slyly, deceptively, disingenuously, insincerely, and duplicitously. These words all carry a negative connotation and imply an attempt to deceive or manipulate others. Other potential synonyms for cantingly might include mendaciously, falsely, or deceitfully. These words all suggest that the speaker is intentionally misleading others in some way. Anyone who wants to express the idea of speaking in a phony or dishonest manner could use any of these synonyms to convey their meaning precisely.