The expression "more forsure" implies a desire for additional certainty or confirmation. If you are looking for synonyms that convey a similar sentiment, you might consider phrases such as "with greater conviction," "beyond doubt," "without hesitation," or "definitely and unequivocally." Other possibilities include phrases like "undeniably," "absolutely," "positively," or "beyond question." Depending on the context, you might also use words like "surefire," "conclusive," "decisive," or "indisputable" to emphasize the level of confidence you feel about a particular issue. No matter which synonym you choose, the goal is to communicate a sense of unwavering certainty or conviction.