Over-scrupulous refers to someone who is excessively concerned with morals and ethics to the point where it becomes problematic. If you are a writer, you might want to find alternative words to replace over-scrupulous to diversify your vocabulary. Synonyms for over-scrupulous include fastidious, diligent, conscientious, exacting, prudent, strict, scrupulous, and meticulous. Each synonym carries a unique level of scrutiny and depth of concern, meaning that writers can choose the word that best represents the situation or characterisation. Remember that one word can make all the difference in the tone of your writing.