The term "latitudinarian" is used to describe someone who is open-minded and tolerant, particularly when it comes to religious or political beliefs. Antonyms for this word would therefore be words that describe someone who is narrow-minded or intolerant. Some possible antonyms for "more latitudinarian" could include "bigoted," "dogmatic," "inflexible," "intolerant," "narrow-minded," "rigid," "close-minded," or "uncompromising." These words describe people who are unwilling to consider alternative viewpoints or who hold extreme beliefs that are not open to debate or discussion. In contrast, a latitudinarian would be willing to engage in debate and consider alternative viewpoints, making them more open-minded and tolerant.