Synonyms for Trustworthy (same or very similar meaning)
WordNet sense 1 (worthy of being depended on):
dependable, honest, trueWordNet sense 2 (having an acceptable credit rating):
responsibleWordNet sense 3 (conforming to fact and therefore worthy of belief):
authenticWordNet sense 4 (worthy of trust or belief):
trustyFrom the ODE community, based on WordNetadd/edit