When it comes to being more ensured or confident about something, there are several synonyms available to use. Some of the commonly used synonyms for this phrase include "guaranteed", "assured", "reliable", "secured", "certified" and "validated". These words convey a sense of surety and confidence, which is important for achieving success in various fields. The use of such words can also help to instill a sense of trust and credibility in both personal and professional interactions. Therefore, when you want to express a greater level of confidence or assurance about a particular matter, using one of these synonyms can be an effective approach.