Synonyms for Consonant (same or very similar meaning)
WordNet sense 1 (involving or characterized by harmony):
harmonic, harmonical, harmonised, harmonized, in harmonyWordNet sense 2 (musically pleasing):
harmoniousWordNet sense 3 (in keeping):
accordant, agreeable, concordant, conformableWordNet sense 4 ((sometimes followed by `with') in agreement or consistent or reliable):
consistentFrom the ODE community, based on WordNetadd/edit