Blunderous can be defined as 'marked by errors and mistakes'. Some of the antonyms for blunderous include precise, accurate, meticulous, flawless, and faultless. Precise refers to exactness and perfection, while accurate means correct and without error. Meticulous suggests great attention to detail and care. On the other hand, flawless and faultless indicate that there are no mistakes or defects. These words can be used in sentences such as, "The surgeon's performance was flawless," or, "His attention to detail was meticulous, and he got everything right." When we use these antonyms for blunderous, it not only helps us convey the right meaning with confidence but also helps us communicate without ambiguity.