The antonyms for the word "more nonbelieving" are "more believing," "more accepting," "more faithful," "more trustful," and "more convinced." Nonbelieving refers to a lack of belief, faith or trust in something. The word 'more' here implies an increased or heightened level of non-belief. In contrast, the antonyms reflect a belief, faith or trust in something, whether it be in oneself, a higher power, or a system of values. These antonyms signal a willingness to accept or appreciate something, rather than rejecting or denying it. Encouraging an attitude of open-mindedness and a willingness to look beyond skepticism and doubt, these antonyms can contribute to personal growth and greater understanding of the world around us.